20/10/24 21:03:41.59 qKLszrb1.net
>>174
・・・って聞くまでもなく書いてあった
When expanded as a polynomial in q, it yields the well-known decomposition of the Grassmannian into Schubert cells.
Furthermore, when q is 1 (respectively －1), the Gaussian binomial coefficient yields the Euler characteristic of the corresponding complex (respectively real) Grassmannian.