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Dec
27
revised Group of order 30 can't be simple
The "corrected" solution was faulty, so I removed the wrong part.
Jun
5
revised On the group of signed permutations?
made proof independent of Taylor's book
May
17
revised Find the subgroups of index two of this finite semi-direct product
added proof that $G'$ has index 4 in $G$
May
13
revised Are there any generic thinking approaches for providing mathematical proofs to a given theorem
added hint about how to read proofs
May
13
revised Are there any generic thinking approaches for providing mathematical proofs to a given theorem
added three items