User A. Napster - Mathematics Stack Exchange

A. Napster

Member for 10 years, 4 months
Last seen more than 2 years ago

3 Answers

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1 vote

Given a polynomial $P(x)$, find another polynomial $Q(x)$ such that the powers of $x$ in $P(x)Q(x)$ are multiples of an integer $n$

abstract-algebra polynomials complex-numbers

answered Dec 1, 2017 at 21:22

1 vote

A combinatorial proof of the identity: $\sum_{k=1}^n k \binom{n}{k}^2 = {n}\binom{2n-1}{n-1}$?

combinatorics summation permutations combinations combinatorial-proofs

answered Dec 12, 2017 at 19:07

0 votes

Convergence of Collatz sequences

number-theory

answered Jun 22, 2012 at 16:38