DavidLHarden

Member for 12 years, 8 months
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Groups that do not exist

Dec 8, 2012

21

Can the unsolvability of quintics be seen in the geometry of the icosahedron?

Jun 10, 2013

14

Why is the Gamma function shifted from the factorial by 1?

Mar 19, 2011

11

Being a subgroup: proof by character theory

Nov 5, 2011

8

Character-free proof that Frobenius kernel is a normal subgroup?

Apr 28, 2011

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Is there a Mathieu groupoid M_31?

Jul 18, 2011

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Maximal Sylow 2-subgroups of simple groups

Jun 16, 2017

11

Efficient presentations for finite groups

Mar 29, 2011

11

(A very limited instance of) Lagrange's Theorem's converse and A_5

Apr 16, 2011

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Orders of automorphism groups of p-groups

Jun 17, 2011

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gr.group-theory

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exceptional-groups

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finite-groups

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Why is the Gamma function shifted from the factorial by 1?

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What other lattices are obtainable from this noncommutative ring?

+10

Maximal Sylow 2-subgroups of simple groups

+10

Larger cycle than 4, 2, 1 in Collatz iteration?

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