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# Tag Archives: MathOverflow

## Automorphisms of groups

I set a question to my group theory class. It is quite easy until suddenly you find yourself falling off a cliff into deep water. Indeed, I don’t know the answer to the second part of this question. Show that … Continue reading

Posted in exposition, open problems
Tagged automorphism, Axiom of Choice, MathOverflow, vector spaces
4 Comments

## MathOverflow

Today I put a toe into the pool that is MathOverflow for the first time. My question was: Which graphs have the property that the number of i-vertex induced subgraphs is at most i for some i<n/2 (where n is … Continue reading

Posted in doing mathematics, mathematics
Tagged graphs, MathOverflow, permutation groups, PlanetMO
7 Comments