Shimrod

Member for 6 years, 9 months
Last seen more than 1 year ago

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abstract-algebra

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6

Does every subgroup of finite index contain a power of each element of the group?

Dec 18, 2018

5

Lagrange's Theorem and Quadratic Character of $-2$

Nov 8, 2017

4

Homomorphism of coordinate rings induces a polynomial map

Sep 6, 2018

3

Is the Riemann zeta function surjective?

May 16, 2018

3

Units in a quotient of a quadratic number ring

Apr 9, 2019

Answers

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2

To prove: $n!=\sum\limits_{r=0}^n (-1)^r \binom{n}{r} (n-r)^n$

Jun 21, 2018

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abstract-algebra

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combinatorics

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linear-algebra

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permutations

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number-theory

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