Communities (2)
Top network posts
- 34 Groups that do not exist
- 30 Is there a Mathieu groupoid M_31?
- 21 Can the unsolvability of quintics be seen in the geometry of the icosahedron?
- 13 Why is the Gamma function shifted from the factorial by 1?
- 11 Efficient presentations for finite groups
- 11 (A very limited instance of) Lagrange's Theorem's converse and A_5
- 11 Being a subgroup: proof by character theory
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