Automorphisms of nonsplit coverings of PSL(2,q) in odd characteristic dividing q-1
Keywords:
nonsplit extension, cohomology, automorphism groupAbstract
We classify the nonsplit extensions of elementary abelian p-groups by PSL(2,q), with odd p dividing q-1, for an irreducible induced action, calculate the relevant low-dimensional cohomology groups, and describe the automorphism groups of such extensions.
Published
2023-06-29
Issue
Section
Mathematical logic, algebra and number theory