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Questions in which polynomials (single or several variables) play a key role. It is typically important that this tag is combined with other tags; polynomials appear in very different contexts. Please, use at least one of the top-level tags, such as nt.number-theory, co.combinatorics, ac.commutative-algebra, in addition to it. Also, note the more specific tags for some special types of polynomials, e.g., orthogonal-polynomials, symmetric-polynomials.

4 votes
1 answer
413 views

Convergence of the Double Integral of a Polynomial Reciprocal

Let $f \in \mathbb{R}[x,y]$ be a polynomial satisfying the following conditions: (i) $f(\mathbb{R}^2) \subset [a,\infty)$ where $a>0$; (ii) $f$ is non-degenerate, in the sense that there isn't a non …
Siksek's user avatar
  • 3,142
9 votes
Accepted

Set of primes dividing polynomials and composition

I guess this answer complements Gene's answer above. Here is an example to think about. Let $$ A=(x^2-2)(x^2-17)(x^2-34). $$ It's an easy exercise in quadratic reciprocity to show that $\mathcal{P}(A) …
Siksek's user avatar
  • 3,142
3 votes
2 answers
486 views

Positivity of a finite sum

Define polynomials $$ U(x)=(x+i-1)^k $$ and $$ V(x)=x(x+1)\cdots(x+i-1). $$ Let $Q$ and $R$ be the quotient and remainder on dividing $U$ by $V$. The above sum is the leading coefficient of $R$. …
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