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On Mesoamerican Mathematics
Pablo Noriega B.V.IIIA-CSIC / LANIA .Barcelona / Xalapa .
. Spain / Mexico
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On Mesoamerican Mathematics(A quick and not too scientific overview for
Actuaries)Pablo Noriega B.V.
IIIA-CSIC / LANIA .Barcelona / Xalapa .
. Spain / Mexico
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Contents
1. Domain of Discourse
2. Mathematical Applications
3. Final Remarks
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Contents
1. Domain of Discourse• Basic Assumptions• Implications• Mesoamerica
2. Mathematical Applications3. Final Remarks
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Basic Assumptions (1. Theoretical Postulates)
1. Ontological PlatonismMathematical entities are culture-independent
2. Epistemological RelativismAt a given time, in a given culture, only some
mathematical concepts and practices are known
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Basic Assumptions (1a. Theoretical Postulates Implications)
1. Ontological PlatonismMathematical entities are culture-independent
2. Epistemological RelativismAt a given time, in a given culture, only some
mathematical concepts and practices are known
Valid to “reify”
Look for mathematical contentinto cultural developments:
Tribute (Economics, Demography)Calendrics (Astronomy)Architecture (Geometry)
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Basic Assumptions (2. Methodological Restrictions)
3. Extensional TreatmentNot concerned with intensional aspects (mystical meaning,
religious implications, political uses,…)
4. Not-EthnographicMonumentsCeramics and other archeological objectsOriginal DocumentsContemporary Accounts
5. Restrict to Mesoamerica (Maya & Aztec)AreaTime-frame
Cf. “Ethnomathematics”
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Mesoamerica(P. Birkoff 1943)
San Lorenzo
Tres Zapotes
La Venta
Olmec(-1500, 0)
Monte Alban
Zapotec Mixtec(-500, 1000)
Tajin
TeotihuacanTula
CholulaTenochtitlan
Aztec(-100,1521)
Chichen Itza
TikalPalenque
Maya(-200,1519)
Copan
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Contents
1. Domain of Discourse
1. Mathematical Applications:– Tribute– Calendrics
2. Final Remarks
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Contents
1. Domain of Discourse2. Mathematical Applications:
– Tribute: • Aztec Numerical Notation• Cadastral Registers
– Calendrics3. Final Remarks
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Aztec Numerical Notation
20
400
8000
Mendoza 36r (frg)Vigesimal
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Aztec Numerical Notation
20+20+20+20
20
Vigesimal Additive?Mendoza 37r (frg.)
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More Compound Numbers
Mendoza 42r
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Standard Aztec Numerical Notation
Basic Numbers Compound Numbers1
20
400
8000 VigesimalAdditive
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Contents
1. Domain of Discourse2. Mathematical Applications:
– Tribute: • Aztec Numerical Notation• Cadastral Registers
– Calendrics3. Final Remarks
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Aztec Notational Variants(Texcoco)
P1: Census P2: Land Plots P3: Tribute Base
C. SantaMaríaAsunción
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P1: Census
male female boy girl
Simple Family Unit
male malefemale femaleboygirl girl
Compound Household
Household Demographic Data
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P2: Land Plots
1
1 5 5
12
20
20 1/7
1/2
AdditiveVigesimalOrderedFractions
“Perimeteral Measures”
8
8
20
21
15
15
22
22
12.5
11.5
21.5 20.14
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P3: Tribute Base
16-10 14-9 11-12
15
15
22
22
12.5
21.5 20.14
10 31
11.5 309
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P3: Tribute Base
16-10 14-9 11-1229-10 9-4
More Examples
35-14 28-17 59-4 17-5 18-5 5-3 14-9
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P3: Tribute BaseAREA
AdditiveVigesimalOrderedFractions Third Position:
20 x n“Place Holder”
“Positional”
Second Position:20 x n“Zero”
First Position:n
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Contents
1. Domain of Discourse2. Mathematical Applications:
– Tribute and Cadastral Registers– Calendrics:
• Calendrical Conventions• Maya Numerical Notation• Maya Astronomy
3. Final Remarks
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Calendrics• Observation of Cyclical Astronomical phenomena:
– Equinox/solstice cycles– Cenital transit– Eclipses (moon /sun cycles)– Ecliptic constelations (“Zodiac”)– Venus and Mars synodic cycles
• Time = combination of cycles• Two basic calendars:
– 260 day “ritual” calendar (“Tzolkin”)• 20 “day bearers” of 13 day “weeks”
– 365 day solar calendar (Haab)• 18 “months” of 20 days + 5 extra days
• Other time-keeping conventions • Calendar Round• Long Count• Distance Numbers
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Tzolkin (260-day calendar)
• 20 “day symbols”• 13 numerals
– Use numbers 1-13– Move both each
increment
Olmec invention?Zapotec (piye)Maya (“tzolkin”)Aztec (tonalpohualli)
Madrid 75-6
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Tzolkin Day Glyphs
They appear only with numbers ONE to 13
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Tonalpohualli
Borbonicus XIV
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Tzolkin (260-day calendar)
Mälstrom Zenithal-Passage Hypothesis
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Haab (365-day calendar)• 18 20-day months
– 0-19 Numerals– 18 “Month” symbols (used
sequentially)– Reverse lexicograhical ordering
• 1 5-day month– This month continues the next
year– The 366th day may begin only
with one of four “month” symbols (1, 6, 11, 16) “year bearers”
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Haab Month Symbols1 2 3 4 5 6 7
8 9 10 …
Numbers 0 (“seating glyph”) to 19 precede each number glyph
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Other Time-keeping Conventions
• Calendar Round (one date, two calendars)– Combination of Tzolkin & Haab
• Long Count– Number of days elapsed since “origin”
• Distance Numbers– Number of days elapsed
since a given date (in the same text)
• Lunar Series– Day of lunation, number of lunation (1-6) and deity in a six-
lunations period, length of lunation. All this for a given date
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Calendar Round Dates(in a 52 year cycle)
• Combination of Haab and Tzolkin cycles– Haab = 365 days– Tzolkin = 260 days
• Calendar Round = lcm(365,260) = 18980 days– CR = 52 Haab– CR = 73 Tzolkin
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Long Count Dates
• Distance (in days) between a date of the “calendar round” and a fixed (“origin”) date
– Maya “origin”: 4Ahau, 8Cumhu (Aug 13, 3113 BC)
– Earliests long count dates known: • Chiapa de Corzo (36 BC)• Tres Zapotes (32 BC)• Tikal (292 AD) full positional, without zero• Uaxactun (357 AD) badly preserved, uses two zeroes
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Calendrical NotationTzolkin Date
(Earliest known example of a the use of a number glyph)
ZapotecSan José del Mogote, Oaxaca. Estela 1(300 BC)
Day glyph (“flint”)
Number glyph (“1”)
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Calendrical Notation(Early use of number / day-sign combinations)
ZapotecMonte Albán, OaxacaSouth PlatformStelae 12, 13(AD 300)
1 flint (tzolkin)
year
4 wind(haab fragment)
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Calendrical Notation(Earliest complete “long count” calendric date)
OlmecTres Zapotes, Veracruz Estela C (fragment)(32 BC)
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Calendrical Notation(Earliest full “long count” date)
OlmecTres Zapotes, Veracruz Estela C (fragment)(32 BC)
Bar & Dot NotationBar = 5 units Dot= 1 unit
Vigesimal
Positional Value
7.
16.
6.
16.
18
6 Edznab(Tzolkin)
(1) Uo (haab)
ISIG
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Calendrical Notation(Early “long count” inscription)
8.5.
16.9.7
5 Manik
15 Pop
ISIG
Epi-OlmecLa Mojarra, Veracruz(AD 100)
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Calendrical Notation(Early “distance number” inscription)
20.
3
Epi-OlmecLa Mojarra, Veracruz(AD 100)
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Long Count (5125 years)
MayaQuiriguá, Stela CAD 800
Date=number of days from “origin”
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Classic Period Inscription
Palenque Tablero de los 80 glifos
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Calendrical Arithmetic
• P1: Given two dates calculate the distance between them
• P2: Given a date (e.g.,in CR), obtain the equivalent (e.g., in LC)
• P3: Given a date, find other dates with “interesting” relevant features (astronomical events, cycles, nearest date such that …)
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Contents
1. Domain of Discourse2. Mathematical Applications:
– Tribute Rolls: – Cadastral Registers– Calendrics:
• Calendrical Conventions• Maya Numerical Notation• Maya Astronomy
3. Final Remarks
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Two Facts about Maya Positional Notation
1. All known examples of native positionalMayan numbers are calendrical orastronomical examples.
2. All known Mayan numbers in positional notation use at most five positions
Brickner & Brickner, p193
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Numeric Icons in Maya Inscriptions
5 units (“bar”)
1 unit (“dot”)
Zero units,full count,place holder
MayaQuiriguá, Stela CAD 800
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Notational Conventions in Maya Inscriptions
Additive (bar & dot)
Multiplicative (time units)
Positional?
Zero (a Maya invention)
13=3+5+5
13 Baktuns
0 Tuns
0 Kins
Value × Calendric unit
1
23
45
-
-
Canonical order
MayaQuiriguá, Stela CAD 800
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Conjecture: Basic Mayan Positional Notation
ni є [0,19]Whole Numbers
= 0 units
= 5 units
= 1 unit
Basic SymbolsNumber
Position Value
n4
n0
n1
n2
n3
n4 × 2045th. Position
n3 × 2034th. Position
n2 × 2023th. Position
n1 × 2012nd. Position
n0 × 2001st. Position
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Conjecture: Basic Mayan Positional Notation
= 0 units
= 5 units
= 1 unit
Basic Symbols Whole Numbers
Position
n4 × 204
n0 × 200
n1 × 201
n2 × 202
n3 × 203
Value
n4
n0
n1
n2
n3
Number
n0 є [0,19]
n4 є [0,19]
n3 є [0,19]
n2 є [0,19]
n1 є [0,17]
ni є [0,19]
5th. Position
4th. Position
3th. Position
2nd. Position
1st. Position
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Basic Mayan Calendrical Positional Notation
Whole Numbers
= 0 units
= 5 units
= 1 unit
Basic SymbolsNumber
Position Value
n4
n0
n1
n2
n3
n4 × 203 × 185th. Position
n3 × 202 × 184th. Position
n2 × 20 × 183th. Position
n1 × 2012nd. Position
n0 × 2001st. Position
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Numeric Icons in Maya Codices
Bar & dot symbols
Symbols for zero Symbol for twenty
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Deciphering Maya Numerical Notation: Negative (Ring) Numbers
... used for counting dates previous to the “origin”
Fösterman 62
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Reading a Page of the Dresden Codex
Basic Layout
Fosterman 24
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Fosterman 24
Reading a Page of the Dresden Codex
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Reading a Page of the Dresden Codex8A 7A 6A 5A
3 2 2 24 16 8 016 14 12 100 0 0 0
13 Ahau 5 10 2
4A 3A 2A A
1 112 4 16 85 6 4 20 0 0 08
7 Ahau 12 4 9
A = 8.2.0 = 2920 = 5 x 584
Fosterman 24
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Reading a Page of the Dresden CodexPreface to the Venus Tables260V 195V 130V 65V
Venus Cycle corrections
60V 55V 50V 45VA = 2920
= 8 x 365= 5 x 58440V 35V 30V 25V
584 = Venus Synodic Rev.
20V 15V 10V 5V 4A 3A 2A A
Fosterman 24
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Reading a Page of the Dresden Codex
Fosterman 24
Preface to the Venus Tables
Normal Base “origin” 4Ahau 8 CumhuMinus Ring Number and –B -6.2.0 1 Ahau 18 KayabDistance no. on pre-zero day 9.9.16.0.0Terminal date, nrml.day no. 9.9.9.16.0 1 Ahau 18 Kayab
Ring Number: 6.2.09.9.16.0.09.9.9.16.0
4 Ahau 8 Cumhu1 Ahau 18 Kayab1 Ahau 18 Uo
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Two Facts of Mayan Positional Notation
1. All known examples of native positionalMayan numbers are calendrical orastronomical examples.
2. All known Mayan numbers in positional notation use at most five positions
Brickner & Brickner, p193
Almost TrueNOT TrueNOT True
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“...They have other very long counts, extended to infinity, counting twenty times 8000, or 160,000; then they multiplythis 160,000 again by twenty, and so on until they reach an uncountable figure. They do all this counting on a flat Surface” Landa
Relación de las Cosas de YucatánSec.XXIV
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Codex Madrid
1.7.2.2.12.13.3
Graz 73
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dn 1.7.2.2.12.13.313.5.8.8.13.4.9.9
86’741,06316’’986’985,789
n/d=195.836Graz 73
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Contents
1. Domain of Discourse2. Mathematical Applications:
– Tribute Rolls – Cadastral Registers– Calendrics:
• Calendrical Conventions• Maya Numerical Notation• Maya Astronomy
3. Final Remarks
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Naked-eye AstronomyMayan Astronomical Cycles
1. Solar Cycles2. Lunar Cycles 3. Eclipses4. Venus5. Mars6. Ecliptic Constellations (Zodiac)
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Solar Cycles• Equinox / Solstice
– Alignments in:• Uaxactún (Group E)• Chichen Itzá (Caracol, Castillo)• Dzibilchaltun,...
– Shadow plays in:• Chichen Itzá (Castillo)• Uxmal (C. De las Monjas)
O.Casares: Dzibilchaltun
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Solar Cycles (Alignments in Chichén Itza)
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Solar Cycles (Alignments in Chichén Itzá)
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Solar Cyclesw(Alignments in Chichén Itzá)
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Solar Cycles
• Zenithal Transit (105-day period)
• Copán, Izapa• Chichén Itzá (Caracol)• Teotihuacán, M. Albán• Xochicalco (2° correction)
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Venus Cycles• Venus Synodic Revolution = 584 days
– Venus as Morning star: 263 days– Superior conjunction: 50 days– Venus as Evening Star: 263 days– Inferior Conjunction: 8 days
• 5 Venus Synodic Revolutions = 8 Haab
• Dresden pp.24-29 – Conmensurates (VSR, Haab, Tzolkin)– i.e. lcm(584, 365, 260) = 37960 days = 584 x 5 x 13 x 8
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Lunar Cycles
• 29.53059 days – Copan = 29.530201– Palenque = 29.530864
• “Complementary lunar series” in Long Count Dates (between Tzolkin and Haab dates):– 18 “months”, divided into “trimesters”(6months each)– Age of the Moon– Lunar month length (29 or 30 days)– Ocasional extra 30-d month
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Eclipses• Codex Dresden pp. 51-58.
Tables for 33 years, or 405 lunar months with correction values.
Fosterman 54Fosterman 52 (fragment)
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Martian Cycles
• Martian Synodic Revolution = 780 days
• Martian Synodic Revolution = 3 Tzolkin
• Dresden pp. 43-45 (?)
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Ecliptical Constellations
• 13 constellations in the Ecliptic
• 364 days = 13 constellations × 28 days
• Codex Paris• Lintel, Las Monjas Annex (Chichen Itza)• Throne, Governor Palace (Uxmal)
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Contents
1. Domain of Discourse
2. Mathematical Applications
3. Final Remarks– An Overview– Open Questions
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The Maya Scribe
“The chilanes were charged with giving all those in the community the oracles of the demon, ...casting lots in divination, ...They awarded them utmost respect”
LandaRelación de las Cosas de Yucatán
Sec. XXVII
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Scribes in a Maya Vase
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Scribes in a Maya Vase
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Mathematical Concepts in Mesoamerica
• Evidence of – Zero (Maya, Aztec)– Negative Numbers (Maya)– Fractions (Aztec)– Positional notation and other conventions– Modular Arithmetic (Maya)– Area Calculation (Aztec)
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Mesoamerican Mathematics
• Open Topics– Geometric and numerical concepts in Architecture– Geometric and Topological concepts in art– Demographic and Geometric analysis of Cadastral Registers– Economic analysis of tribute– Algorithms– Metrics– Systematic scribal errors
• Hermeneutical Concerns– Internal coherence– Catachronism / anachronism– Iconic languages
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