Crate sankhya 

sankhya

sankhya (Sanskrit: सांख्य — enumeration/analysis) is a library of ancient mathematical systems, historical calendars, and archaeoastronomy for the AGNOS project.

Faithful implementations of computational traditions from eight civilizations, 10+ calendar systems, and archaeoastronomy tools — with cross-civilizational epoch correlation. Every algorithm cites its primary source.

Modules

Module	Domain	Highlights
mayan	Maya	Vigesimal numbers, Long Count, Tzolkin, Haab, Venus tables
babylonian	Babylon	Sexagesimal numbers, Saros cycle, Plimpton 322, Heron’s sqrt
egyptian	Egypt	Unit fractions, doubling multiplication, stellar decans, Sothic cycle
vedic	India	Nikhilam multiplication, Sulba Sutra, Katapayadi, Meru Prastara
chinese	China	Rod numerals, CRT, magic squares, Sexagenary 60-year cycle
greek	Greece	Golden ratio, sieve, GCD, Archimedes’ pi, Antikythera, isopsephy
roman	Rome	Roman numeral conversion, validation, arithmetic (I–MMMCMXCIX)
islamic	Islam	Al-Khwarizmi algebra, Khayyam cubics, Hijri calendar
gregorian	Global	Proleptic Gregorian calendar, JDN conversion
coptic	Egypt	13-month Alexandrian calendar, Anno Martyrum
persian	Iran	Solar Hijri (Jalaali), 2820-year leap cycle
hebrew	Israel	Lunisolar, Metonic cycle, molad, dehiyyot
aztec	Mesoamerica	Tonalpohualli (260-day), Xiuhpohualli (365-day)
epoch	Cross-civilizational	Precession, Seven Sages, unified convert() API
astro	Archaeoastronomy	Coordinates, star catalog, precession, heliacal rising, alignment

Quick Start

use sankhya::mayan::LongCount;
use sankhya::babylonian;
use sankhya::greek;

// Convert days to Mayan Long Count
let lc = LongCount::from_days(1_872_000).unwrap(); // 13.0.0.0.0 (Dec 21, 2012)
assert_eq!(lc.baktun, 13);

// Babylonian square root (Heron's method, from YBC 7289 tablet)
let sqrt2 = babylonian::babylonian_sqrt(2.0, 10).unwrap();
assert!((sqrt2 - std::f64::consts::SQRT_2).abs() < 1e-15);

// Sieve of Eratosthenes
let primes = greek::sieve(100);
assert_eq!(primes.len(), 25); // 25 primes below 100

Re-exports

pub use error::Result;

pub use error::SankhyaError;

Modules

astro

Archaeoastronomy computations.

aztec

Aztec (Mexica) calendar systems.

babylonian

Babylonian mathematics.

chinese

Chinese mathematics.

coptic

Coptic (Alexandrian) calendar.

egyptian

Egyptian mathematics.

epoch

Cross-civilizational epoch correlation.

error

Error types for sankhya.

greek

Greek mathematics.

gregorian

Gregorian calendar.

hebrew

Hebrew (Jewish) calendar.

islamic

Islamic and Arabic mathematics.

mayan

Mayan mathematics and calendar systems.

persian

Persian (Solar Hijri / Jalaali) calendar.

roman

Roman numeral system.

vedic

Vedic and Indian mathematics.