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math.GR2010
Complementation in the Group of Units of Matrix Rings
Stewart Wilcox
Let be a ring with and $\J(R)$ its Jacobson radical. Then $1+\J(R)$ is a normal subgroup of the group of units, . The existence of a complement to this subgroup was e…
math.GR2010
Reduction of the Hall-Paige conjecture to sporadic simple groups
Stewart Wilcox
A complete mapping of a group is a permutation such that is also a permutation. Complete mappings of are equivalent to tranversals of th…