binomial -- binomial coefficient

Synopsis

• Usage:

  binomial(n,k)

• Inputs:
  • n, an integer or a ring element
  • k, an integer, , must be non-negative
• Outputs:
  • the binomial coefficient, the coefficient of $x^k$ in $(1+x)^n$ or $n(n-1)...(n-k+1)/k!$

Description

i1 : binomial(13,6)

o1 = 1716

i2 : binomial(-1,3)

o2 = -1