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9. MATHEMATICS

9.1. PRE-LITERATE COUNTING AND ACCOUNTING

MS 5087/08 Australia, 20000-3000 BC
MS 5087/15 Australia, 20000-3000 BC
MS 5067/1-8 Syria /Sumer /Highland Iran, ca. 8000-3500 BC
MS 4522/1 Syria/Sumer/Highland Iran, 3500-3200 BC
MS 4631Syria/Sumer/Highland Iran, ca. 3700-3200 BC
MS 4632 Syria/Sumer/Highland Iran, ca. 3700-3200 BC
MS 4638 Syria/Sumer/Highland Iran, ca. 3700-3200 BC
MS 4523 Syria/Sumer/Highland Iran, ca. 3500-3200 BC
MS 3007 Syria/Sumer/Highland Iran, ca. 3500 BC
MS 4647 Syria/Sumer/Highland Iran, ca. 3500-3200 BC

9.2. ARITHMETICS

MS 3047 Sumer, 27th c. BC
MS 1844 Sumer, ca. 2050 BC
MS 3866 Babylonia, ca. 19th c. BC
MS 2351 Babylonia, ca. 19th c. BC
MS 2221 Babylonia, ca. 19th c. BC

9.3. ALGEBRA

MS 3048 Babylonia, ca. 19th c. BC
MS 2317 Babylonia, ca. 19th c. BC
MS 5112 Babylonia, ca. 1900-1700 BC

9.4. GEOMETRY

MS 3052 Babylonia, ca. 19th c. BC
MS 3049 Babylonia, ca. 17th c. BC
MS 2192 Babylonia, ca. 19th c. BC

9.5. PRACTICAL MATHEMATICS

MS 1844 Sumer, ca. 2050 BC
MS 2221 Babylonia, ca. 19th c. BC
MS 2832 Babylonia, 2000-1700 BC

9. Mathematics

The mathematical collection, ca. 380 MSS, starts with the beginning of mathematics in the 27th c. BC, and ends with Einstein. 11 of the earliest examples from Sumer and Babylonia where mathematics was invented, are listed here.

The counting of tokens and goods for accounting purposes is earlier than both script and mathematics. 10 examples are included as an introduction.

9.1 Pre-Literate Counting and Accounting

MS 5087/08
ms 5087/08
CYLCON (YURDA), A TALLY WITH MARKS POSSIBLY RECORDING THE NUMBER OF YOUNG MEN TO PASS THE INITIATION RITUALS TO MANHOOD OF THE "BORA"

 

MS on chalk-like stone, Werenia, Bourke, New South Wales, Australia, ca. 20000-3000 BC, 1 oval-conical triangular cylcon slanting rounded base, 19x10x6 cm, 3 series of regularly longitudinal lines of 12+9+14 evenly spaced parallel dashes, half of the surface worn away due to weathering.

 

Provenance: 1. Found in Werenia, Bourke, South West Wales, Australia (1969); 2. H. Gallasch Museum, Australia (1973-); 3. Sam Fogg Rare Books Ltd., London.

Commentary: Cylcons are earlier than churingas. There is no certain ways to date individual cylcons. The oldest cylcon/message stone found in a dateable archaeological context is about 20,000 years old. The simple line motifs of the oldest cylcons represent the earliest art of the Aborigines, from a very early period of occupation. In Australian nomenclature this is the colonizing period, or early Stone Age, ca. 50,000/40,000-3,000 BC. With the earliest rock-carvings and -paintings, the cylcons represent the oldest form of communication and art; and they represent the oldest religion still observed. Only 2 Aborigines have been able to communicate their name of the cylcons: Yurda, and Wommagnaragnara (Heart of the snake), respectively. Other uses as tallies are possible, such as counting of dead people, warriors, emus, measures of nardo seeds, or mapping purposes counting day-marches in various directions. Later the use could also change to other magic rituals, some involving the chipping off smaller flakes, and the practical use for pounding and crushing. Much more research is needed before the cylcons' real age and significance can be properly understood and appreciated. The term cylcon is derived from the title of R. Ethridge's publication: The Cylindro-conical and Stone Implements of Western New South Wales and their significance. Ethnological Series No. 2, Memoirs of the Geological Survey of New South Wales, 1916:1-41.

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MS 5087/15
ms 5087/15
CYLCON (YURDA), A TALLY WITH MARKS POSSIBLY RECORDING THE NUMBER OF YOUNG MEN TO PASS THE INITIATION RITUALS TO MANHOOD OF THE "BORA"

MS on pink hard sandstone, New South Wales, Australia, ca. 20000-3000 BC, 1 cylindro- conical and cornute form cylcon flat base, 25x8x7 cm, 7 groups of 8-10 parallel lines in vertical rows converging at point, double lines of evenly spaced dashes below placed both transversal and longitudinal, 6 groups of 3+4+6 dashes, 6 groups of 6-9 parallel lines in vertical rows around base. .

Provenance: 1. Found in New South Wales, Australia; 2. H. Gallasch Museum, Australia (1973-); 3. Sam Fogg Rare Books Ltd., London.

Commentary: Cylcons are earlier than churingas. There is no certain ways to date individual cylcons. The oldest cylcon/message stone found in a dateable archaeological context is about 20,000 years old. The simple line motifs of the oldest cylcons represent the earliest art of the Aborigines, from a very early period of occupation. In Australian nomenclature this is the colonizing period, or early Stone Age, ca. 50,000/40,000-3,000 BC. With the earliest rock-carvings and -paintings, the cylcons represent the oldest form of communication and art; and they represent the oldest religion still observed. Only 2 Aborigines have been able to communicate their name of the cylcons: Yurda, and Wommagnaragnara (Heart of the snake), respectively. Other uses as tallies are possible, such as counting of dead people, warriors, emus, measures of nardo seeds, or mapping purposes counting day-marches in various directions. Later the use could also change to other magic rituals, some involving the chipping off smaller flakes, and the practical use for pounding and crushing.

Much more research is needed before the cylcons' real age and significance can be properly understood and appreciated. The term cylcon is derived from the title of R. Ethridge's publication: The Cylindro-conical and Stone Implements of Western New South Wales and their significance. Ethnological Series No. 2, Memoirs of the Geological Survey of New South Wales, 1916:1-41.

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MS 5067/1-8
NEOLITHIC PLAIN COUNTING TOKENS POSSIBLY REPRESENTING 1 MEASURE OF GRAIN, 1 ANIMAL AND 1 MAN OR 1 DAY'S LABOUR, RESPECTIVELY ms 5067/1-8

Counting tokens in clay, Syria/Sumer/Highland Iran, ca. 8000-3500 BC, 3 spheres: diam. 1,6, 1,7 and 1,9 cm , (D.S.-B 2:1); 3 discs: diam. 1,0x0,4 cm, 1,1x0,4 cm and 1,0x0,5 cm (D.S.-B 3:1); 2 tetrahedrons: sides 1,4 cm and 1,7 cm (D.S.-B 5:1).

Commentary: About 8000 BC the Palaeolithic notched tallies representing the simplest form of counting, in one-to-one correspondence, were superseded by Neolithic tokens of various geometric forms suited for concrete counting, including the type of commodity.

This invention was used without any discontinuity for 5000 years, prior to the use of abstract numbers which lead to writing about 3300 BC, and then to mathematics ca. 2600 BC. When tokens were invented they were the first clay objects of the Near East, and they first exploited systematically most of the basic geometric forms, such as spheres, tetrahedrons, cones, cylinders, discs, quadrangles, triangles, etc. They were first kept in baskets, leather poaches, clay bowls, etc., and later within clay bullas, see MSS 4631, 4632 and 4638.

Exhibited: The Norwegian Intitute of Palaeography and Historical Philology (PHI), Oslo, 13.10.2003-06.2005.

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MS 4522/1
COMPLEX COUNTING TOKEN REPRESENTING 1 JAR OF OIL ms 4522/1

Counting token in stone, Syria/Sumer/Highland Iran, ca. 4000-3200 BC, 1 ovoid token, diam. 2,0x2,3 cm, circular line at the top and piercing at the bottom.

Context: For a drum shaped token with zigzag band, see MS 4522/2 (Schmandt-Besserat 3:72), and for disk type tokens, see MSS 4522/3-8.

Commentary: Same type as Schmandt-Besserat 6:14, but pierced at the bottom. The complex tokens were a natural development from the plain tokens (see MSS 5067/1-8) with new forms, added lines, dots and various designs to cover the more advanced accounting needs. They were first kept in baskets, leather poaches, bowls, etc., and then to some extent within bulla-envelopes (see MS 4631), but mainly attached to strings fastened to a bulla (see MS 4523).

They lasted until ca. 3200 BC, when they were superseded by counting tablets and pictographic tablets. Some of the earliest tablets have actual tokens impressed into the clay to form numbers and pictographs, and many of the pictographs were illustrations of tokens. An account of 14 jars of oil would just be 14 tokens of the present type. On a pictographic tablet this representation would be substituted by the number 14 and the pictograph of a jar with lid looking similar to the token. This was the first break-through of the invention of writing. For such a pictographic tablet, see MS 4551. (All 8 tokens MSS 4522/1-8 are illustrated here, text: Counting tokens representing a Jar of oil and various textiles, Near East, ca. 4000-3200 BC.)

Exhibited: The Norwegian Intitute of Palaeography and Historical Philology (PHI), Oslo, 13.10.2003-06.2005.

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MS 4631
BULLA-ENVELOPE WITH 11 PLAIN AND COMPLEX TOKENS INSIDE, REPRESENTING AN ACCOUNT OR AGREEMENT, TENTATIVELY OF WAGES FOR 4 DAYS' WORK, 4 MEASURES OF METAL, 1 LARGE MEASURE OF BARLEY AND 2 SMALL MEASURES OF SOME OTHER COMMODITY ms 4631

Bulla in clay, Syria/Sumer/Highland Iran, ca. 3700-3200 BC, 1 spherical bulla-envelope (complete), diam. ca. 6,5 cm, cylinder seal impressions of a row of men walking left; and of a predator attacking a deer, inside a complete set of plain and complex tokens: 4 tetrahedrons 0,9x1,0 cm (D.S.-B.5:1), 4 triangles with 2 incised lines 2,0x0,9 (D.S.-B.(:14), 1 sphere diam. 1,7 cm (D.S.-B.2:2), 1 cylinder with 1 grove 2,0x0,3 cm (D.S.-B.4:13), 1 bent paraboloid 1,3xdiam. 0,5 cm (D.S.-B.8:14).

Context: Total number of bulla-envelopes worldwide is ca. 165 intact and 70 fragmentary.

Commentary: While counting for stocktaking purposes started ca. 8000 BC using plain tokens of the type also represented here, more complex accounting and recording of agreements started about 3700 BC using 2 systems: a) a string of complex tokens with the ends locked into a massive rollsealed clay bulla (see MS 4523), and b) the present system with the tokens enclosed inside a hollow bulla-shaped rollsealed envelope, sometimes with marks on the outside representing the hidden contents.

The bulla-envelope had to be broken to check the contents hence the very few surviving intact bulla- envelopes. This complicated system was superseded around 3500-3200 BC by counting tablets giving birth to the actual recording in writing, of various number systems (see MSS 3007 and 4647), and around 3300-3200 BC the beginning of pictographic writing (see MSS 2963 and 4551).

Exhibited: The Norwegian Intitute of Palaeography and Historical Philology (PHI), Oslo, 13.10.2003-06.2005.

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MS 4632
BULLA-ENVELOPE WITH 17 PLAIN TOKENS INSIDE, REPRESENTING AN ACCOUNT OF WAGES FOR TENTATIVELY 300 MAN DAYS AT A RATE OF 1.8 MEASURES OF BARLEY PER MAN DAY, TOTAL WAGES 540 MEASURES OF BARLEY (DAY PAY FOR 300 MEN, OR YEAR PAY FOR ONE MAN ms 4632

Bulla in clay, Syria/Sumer/Highland Iran, ca. 3700-3200 BC, 1 spherical bulla-envelope (complete), diam. ca. 7 cm, cylinder seal impressions of a row of men each carrying a sack on his head towards a large cauldron placed on a rounded stand; and of a line of tall ringstaffs and men; a 3rd impression of a large disk type token or the bottom of a large cone, diam. 2,2 cm, possibly representing the total sum of the complete set of plain tokens inside: 1 sphere diam. 1,5 cm (D.S.-B.2:2), 8 small spheres diam. 0,8 cm of which 1 still sticks to the inside of the bulla (D.S.-B.2:1), 5 cones diam.1,0x1,5 cm (D.S.-B.1:1), 3 small cylinders diam. 0,4xca.1,2 cm (D.S.-B.4:1).

Context: Only 25 more bulla-envelopes are known from Sumer, all excavated in Uruk. Total number of bulla-envelopes worldwide is ca. 165 intact and 70 fragmentary.

Commentary: 17 tokens is the largest number found inside a bulla-envelope. While counting for stocktaking purposes started ca. 8000 BC using plain tokens of the type here, more complex accounting and recording of agreements started about 3700 BC using 2 systems: a) a string of complex tokens with the ends locked into a massive rollsealed clay bulla (see MS 4523), and b) the present system with the tokens enclosed inside a hollow bulla-shaped rollsealed envelope, sometimes with marks on the outside representing the hidden contents. The bulla-envelope had to be broken to check the contents hence the very few surviving intact bulla- envelopes. This complicated system was superseded around 3500-3200 BC by counting tablets giving birth to the actual recording in writing, of various number systems (see MSS 3007 and 4647), and around 3300-3200 BC the beginning of pictographic writing (see MSS 2963 and 4551).

Published: Jöran Friberg: A remarkable Collection of Babylonian Mathematical Texts. Springer 2007. Sources and Studies in the History of Mathematics and Physical Sciences. Manuscripts in the Schøyen Collection, vol. 6, Cuneiform Texts I. p. 384.

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MS 4638
ms 4638
BULLA-ENVELOPE WITH 1 PLAIN TOKEN INSIDE, REPRESENTING AN ACCOUNT OR AGREEMENT OF TENTATIVELY 1 VERY LARGE MEASURE OF BARLEY, THE YEAR'S PAY FOR ONE MAN

Bulla in clay, Syria/Sumer/Highland Iran, ca. 3700-3200 BC, 1 spherical bulla-envelope (complete), diam. 6,0-6,8 cm, cylinder seal impression of several men facing tall ringstaff; and another with animals; token inside: 1 large sphere diam. 2 cm (D.S.-B.2:2).

Context: Only 25 more bulla-envelopes are known from Sumer, all excavated in Uruk. Total number of bulla-envelopes worldwide is ca. 165 intact and 70 fragmentary.

Commentary: While counting for stocktaking purposes started ca. 8000 BC using plain tokens of the type here, more complex accounting and recording of agreements started about 3700 BC using 2 systems: a) a string of complex tokens with the ends locked into a massive rollsealed clay bulla (see MS 4523), and b) the present system with the tokens enclosed inside a hollow bulla-shaped rollsealed envelope, sometimes with marks on the outside representing the hidden contents. The bulla-envelope had to be broken to check the contents hence the very few surviving intact bulla- envelopes. This complicated system was superseded around 3500-3200 BC by counting tablets giving birth to the actual recording in writing, of the sexagesimal counting system (see MSS 3007 and 4647), and around 3300-3200 BC the beginning of pictographic writing (see MSS 2963 and 4551).

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MS 4523
ms 4523
BULLA FOR HOLDING A STRING OF COMPLEX COUNTING TOKENS CONCERNING A TRANSACTION

Bulla in clay, Syria/Sumer/Highland Iran, ca. 3500-3200 BC, 1 oblong bulla, diam. 2,5x6,5 cm, rollsealed with a line of animals walking left or 2 men standing with arms raised, pierced for holding a string of counting tokens.

Context: For another bulla of the same type, see MS 5113.

Commentary: The bulla originally locked the ends of a string with a number of complex counting tokens attached to it, representing 1 transaction. The string with the tokens was hanging outside the bulla like a necklace. If the string had, say, 5 disk type tokens representing types of textiles, this number could not be tampered with without breaking the seal. The tokens could also be entirely enclosed in the centre of the bulla, see MSS 4631, 4632 and 4638. Tokens were used for accounting purposes in the Near East from the Neolithic period ca. 8000 BC until ca. 3200 BC, when they were superseded by counting tablets and pictographic tablets. Some of the earliest tablets have actual tokens impressed into the clay to form numbers and pictographs, and some of the pictographs were illustrations of tokens, see 4551.

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MS 3007
ms 3007
NUMBERS 10 AND 5 +4 + 4 + 4 + 5 + 3

MS on clay, Syria/Sumer/Highland Iran, ca. 3500-3200 BC, 1 elliptical tablet, 6,7x4,4x1,9 cm, 2+1 compartments, 2 of which with 3 columns of single numbers as small circular depressions.

Commentary: Numerical or counting tablets with their more complex combination of decimal and sexagesimal numbers are a further step from the tallies with the simplest form of counting in one-to-one correspondence. They were used parallel with the bulla-envelopes with tokens.

The commodity counted was not indicated in the beginning, but was gradually imbedded in the numbers system or with a seal or a pictograph of the commodity added, i. e. development into ideonumerographical tablets, the forerunners to pictographic tablets. There are only about 260 numerical tablets known. Most of them are found in Iran.
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MS 4647
NUMBERS 3+4, POSSIBLY REPRESENTING 3 MEASURES OF BARLEY AND 4 MEASURES OF SOME OTHER COMMODITY, IN SEXAGESIMAL NOTATION ms 4647

MS on clay, Syria/Sumer/Highland Iran, ca. 3500-3200 BC, 1 tablet, 4,4x5,0x2,3 cm, 2 lines with 3 small circular depressions and 4 short wedges.

Commentary: Numerical or counting tablets with their more complex combination of decimal and sexagesimal numbers are a further step from the tallies with the simplest form of counting in one-to-one correspondence. They were used parallel with the bulla-envelopes with tokens. The commodity counted was not indicated in the beginning, but was gradually imbedded in the numbers system or with a seal or a pictograph of the commodity added, i. e. development into ideonumerographical tablets, the forerunners to pictographic tablets. There are only about 260 numerical tablets known. Most of them are found in Iran.

Exhibited: The Norwegian Intitute of Palaeography and Historical Philology (PHI), Oslo, 13.10.2003-06.2005.

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9.2 Arithmetics

MS 3047
ms 3047
  1. METRO-MATHEMATICAL TABLE OF SIDES AND AREAS OF 6 SIMILAR LARGE RECTANGLES WHERE THE LONG SIDE IS 60 TIMES LONGER THAN THE SHORT SIDES WHICH ARE ASCENDING FROM 5, 10, 20, - - TO 50 NINDA
  2. GEOMETRICAL PROGRESSION OF 5 SEXAGESIMAL NUMBERS POSSIBLY REPRESENTING AREAS

MSin Old Sumerian on clay, Shuruppak, Sumer, 27th c. BC, 1 tablet, 7,2x7,1x2,0 cm, 28 compartments in cuneiform script.

Context: The tablet probably comes from Early Dynastic IIIa Shuruppak like the previously published TSS 926 (1937). TSS 188 (1937), and VAT 12593 (1923 & 1993), also metro-mathematical school texts dealing with areas of quadrilaterals.

Commentary: Probably the oldest known mathematical text. The sides of the 6 rectangles in the ratio 1:60 demonstrates that the mathematics taught in the scribe schools in Sumer before the middle of the third millennium BC was unexpectedly sophisticated. Such a tablet cannot have been of any practical use; it is an example of mathematics for its own sake.

The table on the reverse side is of a new type with no known parallel; it is the only pre-Babylonian example of a geometric progression.

Shuruppak was excavated 1902-1903 and 1931.

Published: Jöran Friberg: Matematiska kilskriftstexter i den norska Schøyensamlingen; in: Nordisk Matematisk Tidskrift, 52:4, 2004, pp. 151-152. Jöran Friberg: A remarkable Collection of Babylonian Mathematical Texts. Springer 2007. Sources and Studies in the History of Mathematics and Physical Sciences. Manuscripts in the Schøyen Collection, vol. 6, Cuneiform Texts I. pp. 150-153.

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MS 3866
ms 3866
MULTIPLICATION TABLE FOR 1.12 ENDING WITH THE SQUARE OF THE HEAD NUMBER 1.12(=72), IN THE SUMERIAN SEXAGESIMAL SYSTEM

MS on clay, Babylonia, 19th c. BC, 1 tablet, 7,8x4,7x1,8 cm, single column, 15+8 lines in cuneiform script.

Commentary: The number 72 or 1 1/5 is the sexagesimal reciprocal of 50, which appears in the standard tables of reciprocals. Scholars have used the absence of any multiplication tables of 1 1/5 as evidence that they did not exist, and that Babylonians did not have multiplication tables for all sexagesimal numbers appearing in their standard table of reciprocals. The present unique tablet proves that making such assumptions is groundless.

Mentioned: Jöran Friberg: A remarkable Collection of Babylonian Mathematical Texts. Springer 2007. Sources and Studies in the History of Mathematics and Physical Sciences. Manuscripts in the Schøyen Collection, vol. 6, Cuneiform Texts I. pp. 73-76, 87.

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MS 2351
EXTREMELY LARGE 15-PLACE SEXAGESIMAL NUMBER 13 22 50 54 59 09 29 58 26 43 17 31 51 06 40, EQUALLING THE 20TH POWER OF 20, WHICH IS 104,857,600,000,000,000,000,000

MSon clay, Babylonia, 19th c. BC, 1 tablet, 4,5x11,7x2,8 cm, single column, 2 lines in cuneiform script.

Commentary: The number is one of the largest numbers recorded on a cuneiform tablet. This tablet can be interpreted as a continuation of MS 2205, since the 2 texts together exhibit the squares of squares of the 3rd, 4th and 5th power of 20.

Published: Jöran Friberg: A remarkable Collection of Babylonian Mathematical Texts. Springer 2007. Sources and Studies in the History of Mathematics and Physical Sciences. Manuscripts in the Schøyen Collection, vol. 6, Cuneiform Texts I. pp. 43-44.

ms 2351
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9.3 Algebra

MS 3048
ms 3048
TABLE WITH DATA FOR SOLVING CUBIC EQUATIONS, IN THE SUMERIAN SEXAGESIMAL SYSTEM

MS on clay, Babylonia, 19th c. BC, 1 tablet, 7,6x4,4x2,3 cm, 3 columns, 30 lines in cuneiform script.

Binding:Context: The only similar text known before is a Late Babylonian table text, where the numbers m at left take the values nxnx(n+1). Problems of the mentioned type are known from a large Old Babylonian clay tablet (BM 85200+VAT 6599).

Commentary: Every line of the table says, "m has the root n". The numbers n at right take the values 1 to 30. The numbers m at left take the corresponding values nx(n+1)x(n+2). In the 6th line, for instance, n = 6 and m = 6x7x8 = 336 = 5x60 + 36. The table was probably used to set up a series of problems leading to cubic equations guaranteed to have integers as solutions. The problems would have been of the form "An excavated room. Its length equals its width plus 1 cubit. Its height equals its length. Its volume plus its bottom area is ... (a given number)."

Published: Jöran Friberg: A remarkable Collection of Babylonian Mathematical Texts. Springer 2007. Sources and Studies in the History of Mathematics and Physical Sciences. Manuscripts in the Schøyen Collection, vol. 6, Cuneiform Texts I. pp. 56, 62-63.

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MS 2317
ms 2317
SEXAGESIMAL DIVISION SUM WITH A NON-REGULAR DIVISOR, 1 01 01 01 DIVIDED WITH 13 IS 4 41 3

MS in Old Babylonian on clay, Babylonia, 19th c. BC, 1 tablet, 2,9x2,9x1,4 cm, single column, 2 lines in cuneiform script.

Commentary: The meaning of the text is that the first number, 1 01 01 01 in sexagesimal place value notation, is exactly divisible by 13, and that the quotient is 4 41 37. A dressed up version is known from an early Old Babylonian tablet from Ur, where 1 01 01 01 sheep are divided between 13 shepherds.

Published: Jöran Friberg: Matematiska kilskriftstexter i den norska Schøyensamlingen; in: Nordisk Matematisk Tidskrift, 52:4, 2004, p. 148. Jöran Friberg: A remarkable Collection of Babylonian Mathematical Texts. Springer 2007. Sources and Studies in the History of Mathematics and Physical Sciences. Manuscripts in the Schøyen Collection, vol. 6, Cuneiform Texts I. p. 155.

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MS 5112  
MS 5112
  1. METRIC ALGEBRA, A TWO WAYS EXTENDED SQUARE, GEOMETRIC SOLUTION PROCEDURE TO COMPLETE THE SSQUARE
  2. QUADRATIC-LINEAR AND QUADRATIC-RECTANGULAR SYSTEMS OF EQUATIONS FOR 2 UNKNOWNS
  3. THREE CONCENTRIC SQUARES WITH THEIR SIDES IN AN ARITHMETICAL PROGRESSION
  4. QUADRATIC LINEAR SYSTEM OF EQUATIONS FOR 2 SQUARES
  5. ARITHMETICAL PROGRESSION OF SQUARE SIDES OF 6 CONCENTRIC SQUARES
  6. QUADRATIC EQUATION WITH INCORRECT DATA
  7. RECTANGULAR-LINEAR SYSTEM OF EQUATIONS WITH ADDING/SUBRACTING A CORNER
  8. RECTANGLE WHERE THE AREA IS EQUAL TO THE LENGTH PLUS THE FRONT SOLVED BY METRIC ALGEBRA
  9. CHANGING THE FORM OF A RECTANGLE WHILE KEEPING THE AREA, A RECTANGULAR-LINEAR SYSTEM OF EQUATIONS FOR 2 UNKNOWNS
  10. A SYSTEM OF LINEAR EQUATIONS FOR THE LENGTH AND FRONT OF A RECTANGLE
  11. BASIC RECTANGULAR-LINEAR SYSTEM OF EQUATIONS
  12. A RECTANGULAR-LINEAR SYSTEM OF EQUATIONS REDUCED TO A QUADRATIC EQUATION BY SCALING
  13. RECTANGULAR-LINEAR SYSTEM OF EQUATIONS
MS in Middle Babylonian on clay, Babylonia, late Kassite period, 14th-13th c. BC, upper half of a tablet, 8,9x9,8x2,7 cm, 2+2 columns, 125 lines in a clear minute cuneiform script

Commentary: A Collection of 13+3 partly preserved of originally 23 metric algebra problem texts.

Colophon: Total: 23 hand tablets - 22. The problem texts were the higher mathematics of the time, and for the better students only.

Published: Jöran Friberg: A remarkable Collection of Babylonian Mathematical Texts. Springer 2007. Sources and Studies in the History of Mathematics and Physical Sciences. Manuscripts in the Schøyen Collection, vol. 6, Cuneiform Texts I. pp. 308-341.

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9.4 Geometry

MS 3052  
EIGHT MATHEMATICAL PROBLEMS WITH DRAWINGS OF SUBDIVIDED TRAPEZOIDS AND TRIANGLES; MADE AS PROBLEMS APPLIED ON MUD WALLS PARTITIONED INTO TWO OR MORE SEPARATE LAYERS, REPAIRING A BREACH IN A WALL WITH MUD FROM THE TOP OF THE WALL, MEASURING THE THICKNESS BY DRILLING A HOLE THROUGH IT, AS WALL AS COMPUTING RECTANGLES BY DRAWING A DIAGONAL FORMING TWO "PYTHAGOREAN" TRIPLE 5,4,3 AS WELL AS A RECTANGULAR EXCAVATION PROBLEM

MS in Old Babylonian on clay, Uruk, Babylonia, 1763-1739 BC, 1 tablet, 21,0x8,2x2,9 cm, 92 lines in cuneiform script, drawings to each problem.

Commentary: Problems about trapezoids or triangles divided into two or more smaller parts by transversals parallel to the base were popular in Old Babylonian mathematics. Such problems led to systems of linear or quadratic equations. One particular type of problems for divided trapezoids led to the equation square a + square b = 2 square c. Old Babylonian mathematicians could find solutions in integers to both this equation and the similar equation square a + square b = square c, at least 1200 years before Pythagoras.

Colophon: 5 Mud walls, 1 cross-over, 1 excavation, 1 equalside (quadrangle). Together 8 hand tablets (assignments). This kind of subscript with a detailed summary of the topics in the text is only known on the present tablet and MS 3049.

Published: Jöran Friberg: Matematiska kilskriftstexter i den norska Schøyensamlingen; in: Nordisk Matematisk Tidskrift, 52:4, 2004, pp. 156-157. Jöran Friberg: A remarkable Collection of Babylonian Mathematical Texts. Springer 2007. Sources and Studies in the History of Mathematics and Physical Sciences. Manuscripts in the Schøyen Collection, vol. 6, Cuneiform Texts I. pp. 254-278.

MS 3052
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MS 3049  
PROPERTIES OF CHORDS OF CIRCLES, HERE CALLED BOW STRINGS, AND DIAMETERS IN CIRCLES; PROBLEM OF A GATE IN THE CITY WALL, WITH A SOLUTION IN INTEGERS TO THE THREE-DIMENSIONAL DIAGONAL EQUATION MS 3049

MS in Old Babylonian on clay, Uruk, Babylonia, ca. 17th c. BC, upper left quarter of a tablet, 11,5x6,4x2,2 cm, single column, 43 lines in an expert cuneiform script, signed by the scribe, drawings of 2 circles with diameters and chords indicated.

Commentary: The complete tablet contained 16 different exercises on 5 subjects, 6 problems of the circle, 5 problems of quadrates, 1 problem for the triangle, 3 problems for "brickforms" (parallel-trapezes), 1 problem of an "inner diagonal", which is preserved here. This is a geometrical problem where the three-dimensional Pythagorean rule came into play, long before Pythagoras lived. This is a high quality tablet possibly from a royal library.

Colophon: Its name: 6 arches (circles), 5 squares, 1 peghead (triangle), 3 brick moulds, 1 inner cross-over (diagonal) of a gate. This kind of subscript with a detailed summary of the topics in the text is only known on the present tablet and on MS 3042.

Published: Jöran Friberg: Matematiska kilskriftstexter i den norska Schøyensamlingen; in: Nordisk Matematisk Tidskrift, 52:4, 2004, pp. 154-156. Jöran Friberg: A remarkable Collection of Babylonian Mathematical Texts. Springer 2007. Sources and Studies in the History of Mathematics and Physical Sciences. Manuscripts in the Schøyen Collection, vol. 6, Cuneiform Texts I. pp. 295-304.

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MS 2192  
GIVEN 2 CONCENTRIC AND PARALLEL EQUILATERAL TRIANGLES WITH THE AREA BETWEEN THEM DIVIDED INTO 3 EQUALLY SHAPED TRAPEZOIDS; COMPUTE THE AREA BETWEEN THE 2 TRIANGLES AS THE SUM OF THE AREAS OF THE 3 TRAPEZOIDS; SCHOOL TEXT

MS in Old Babylonian on clay, Babylonia, 19th c. BC, 1 tablet, diam. 7,1x2,5 cm, 8+3 lines in cuneiform script, drawing of 2 concentric and parallel equilateral triangles with the sides given as 60 and 10.

Commentary: The sides of the trapezoids are correctly computed. The text may have been an assignment to a student, but the answer to the problem is not given. No parallel to this text has been published before.

This text shows the difference between Babylonian and Greek geometry; while the classical Greek was abstract and reasoning, the Babylonian was concrete and numerical.

Published: Jöran Friberg: Matematiska kilskriftstexter i den norska Schøyensamlingen; in: Nordisk Matematisk Tidskrift, 52:4, 2004, p. 150-151. Jöran Friberg: A remarkable Collection of Babylonian Mathematical Texts. Springer 2007. Sources and Studies in the History of Mathematics and Physical Sciences. Manuscripts in the Schøyen Collection, vol. 6, Cuneiform Texts I. pp. 202-05.

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9.5 Practical Mathematics

MS 1844  
SUM OF A GEOMETRIC PROGRESSION COMPUTED FROM THE BOTTOM UP. THE FIRST TERM IS 2, THE SECOND TERM IS 2X(1+1/6) = 2 1/3, WRITTEN AS 2;20. THE SUM IS GIVEN IN LINE 1, IN SEXAGESIMAL PLACE VALUE NOTATION; SCHOOL TEXT REPRESENTING THE NUMERICAL SOLUTION ALGORITHM FOR AN INHERITANCE PROBLEM FOR 7 BROTHERS

MS in Neo Sumerian on clay, Babylonia, 20th c. BC, 1 round tablet, 11,0x3,5 cm, 9 lines in cuneiform script.

Context: No other Old Babylonian mathematical text is written from the bottom up in this way.

Commentary: According to the subscript, the number in each line should be equal to the number in the line above it, minus a seventh of that number. Actually, the 7 numbers in lines 2-8 have been computed from the bottom up, beginning with 2 and then making the number in each line equal to the number in the line below it plus a sixth of that number. The sum of the 7 numbers is recorded in line 1. A numerical error in line 3 is propagated upwards, to lines 2 and 1. The recorded numbers look like very large integers, but are actually all a small integer plus a sexagesimal fraction.

MS 1844

The youngest of the 7 brothers gets 2, the next gets 2x(1+1/6), the next 2.20x(1+1/6), etc., or read from the top each brother gets 1/7 less than the brother before him. The tablet certainly has been re-used, and there are traces of possible numerical notation from its previous use.

Published: Jöran Friberg: A remarkable Collection of Babylonian Mathematical Texts. Springer 2007. Sources and Studies in the History of Mathematics and Physical Sciences. Manuscripts in the Schøyen Collection, vol. 6, Cuneiform Texts I. pp. 182-186.

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MS 2221 MS 2221
MATHEMATICAL CALCULATIONS ON CARRYING BRICKS AND MUD, THE 4X4 TABLE LISTS CONSTANTS FOR CARRYING THE 3 MOST COMMON BRICK SIZES AND MUD, THE LOAD OF 6 BRICKS, 50 MINAS (25 KG), THAT ONE WORKER CAN CARRY, AND THE DAILY CARRYING DISTANCE, 45.60 LENGTH UNITS = CA. 10,8 KM

MS on clay, Babylonia, 19th c. BC, 1 tablet, 5,0x5,2x2,3 cm, 3 + 4 columns, 9+6 lines in cuneiform script.

Published: Jöran Friberg: A remarkable Collection of Babylonian Mathematical Texts. Springer 2007. Sources and Studies in the History of Mathematics and Physical Sciences. Manuscripts in the Schøyen Collection, vol. 6, Cuneiform Texts I. pp. 93-95, 169-171.

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MS 2832 MS 2832
SOLUTION ALGORITHM FOR A COMBINED MARKET RATE EXERCISE, BY LETTING THE MARKET RATES 1, 2, 3, 4 FOR A COMMODITY WITH COMBINED UNIT PRICE OF 2. 05 BE THE NUMBER OF UNITS THAT CAN BE PURCHASED FOR 1 SHEKEL OF SILVER

MS in Old Babylonian on clay, Babylonia, 2000-1700 BC, 1 tablet, 6,7x7,3x2,3 cm, 4 columns, 5 lines in cuneiform script.

Context: This tablet is a parallel to MS 2830.

Commentary: In a market economy before the invention of money, it was more convenient to operate with market rates. Money was not invented until 7th c. BC in Lydia in Western Asia Minor. The text can also be expressed as: To compute a number R such that 1 shekel of silver is the total price of R units of each of 4 different commodities with the individual market rates 1, 2, 3 and 4 units per shekel of silver.

Published: Jöran Friberg: A remarkable Collection of Babylonian Mathematical Texts. Springer 2007. Sources and Studies in the History of Mathematics and Physical Sciences. Manuscripts in the Schøyen Collection, vol. 6, Cuneiform Texts I. pp. 159-161.

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