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For questions on the Hilbert function and Hilbert polynomial of graded algebras over fields.

3 votes
Accepted

Raising coefficients of a power series to some power

It's a general fact about any rational power series $$\sum_{n=0}^\infty a_n t^n = {p(t) \over \prod_{i=1}^r (1-\gamma_i t)^{d_i}}$$ (where $p(t)$ is some polynomial of degree less than $\sum_{i=1}^r …
Timothy Chow's user avatar
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5 votes

On the polynomial $\sum_{k=0}^n\binom{n}{k}(-1)^kX^{k(n-k)}$

This is a comment on Zach Teitler's question about Hilbert functions. Fröberg's conjecture implies, as a special case, that the Hilbert function of an ideal generated by $2m$ general degree-$(2m−1)$ …
Timothy Chow's user avatar
  • 82.7k