# Semantic search

Algebra group structures for Klein four-group, Baer invariants and extension theory for Klein four-group, Element structure of Klein four-group, Endomorphism structure of Klein four-group, Extensions for nontrivial outer action of V4 on D8, Extensions for trivial outer action of V4 on D8, Extensions for trivial outer action of V4 on Q8, Fusion systems for Klein four-group, Galois extensions for Klein four-group, Group cohomology of Klein four-group, Linear representation theory of Klein four-group, Modular representation theory of Klein four-group, Projective representation theory of Klein four-group, Second cohomology group for nontrivial group action of Z2 on V4, Second cohomology group for trivial Lie ring action of V4 on Z2, Second cohomology group for trivial group action of D8 on V4, Second cohomology group for trivial group action of E8 on V4, Second cohomology group for trivial group action of Q8 on V4, Second cohomology group for trivial group action of V4 on E8, Second cohomology group for trivial group action of V4 on V4, Second cohomology group for trivial group action of V4 on Z2, Second cohomology group for trivial group action of V4 on Z4, Second cohomology group for trivial group action of V4 on Z8, Second cohomology group for trivial group action of V4 on direct product of Z4 and Z2, Second cohomology group for trivial group action of Z4 on V4, Subgroup structure of Klein four-group, Supercharacter theories for Klein four-group, Supergroups of Klein four-group