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Mathematics
Michael Chapman's user avatar
Michael Chapman's user avatar
Michael Chapman's user avatar
Michael Chapman
  • Member for 8 years, 2 months
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5
Can every number be represented as a sum of different reciprocal numbers?
Sep 10, 2016
4
A combinatorial question
Jun 9, 2016
4
Binomial coefficients mod p
Jun 10, 2016
4
A free group is residually nilpotent
May 17, 2016
4
$x^2$ modulo a prime
Jun 13, 2016
2
Find $3^{333} + 7^{777}\pmod{ 50}$
Jun 9, 2016
2
Why does the Euclidean algorithm always terminate?
Jul 7, 2016
2
Prove that $a^4\equiv 1 \pmod 5$ for any integer
Feb 9, 2017
1
Prove $H < N$ if $N\triangleleft G$, $[G : N]$ finite, $H < G$, $|H|$ finite, and $[G : N]$ and $|H|$ are relatively prime
Jun 9, 2016
1
In set theory, to prove $A=B$, is it always necessary to prove that $A\subset B$ and $B\subset A$
Jun 10, 2016
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16
Injectivity implies surjectivity