Discrete mathematics
- factor — 素因数分解関数
- factorial — factorial function : product of the n first positive integers
- gcd — Greatest (positive) Common Divisor
- lcm — least common (positive) multiple of integers or of polynomials
- nchoosek — Computes binomial numbers (n,k) = numbers of combinations
- primes — 素数関数
- rat — 浮動小数点数の有理数近似