User Maksim - MathOverflow

Maksim

Member for 1 year, 8 months
Last seen this week

cnblogs.com/little-epsilon
Guangdong or Shanghai, China

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A majoring-in-math undergraduate of Fudan University.

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6

Is restriction of a ring automorphism a subring automorphism?

5

A finite group of order $mn$ with $m,n$ relatively prime, together with subgroups of orders $m, n$.