binomial(n,k) is not known to be nonnegative for nonnegative integers n,k

[pelegm]

In the same spirit as in #13616:

>>> n = Symbol('n', integer=True, nonnegative=True)
>>> k = Symbol('k', integer=True, nonnegative=True)
>>> binomial(n, k).is_nonnegative  # Should return True

[sj29-innovate]

I am taking this up.
Just wanted to know if this is really needed because if n and k are just symbols even if they are nonnegative , its not necessary that binomial(n,k) is necessarily nonnegative. The current behaviour is to ouput None which i think is acceptable. Please let me know regarding your idea.

[abhigyank]

I want to take this up, since there hasn't been any updates. Which file would be related to binomials?

[pelegm]

Try:

git grep "class binomial"