In mathematical group theory, the Schur multiplier or Schur multiplicator is the second homology group H2(G, Z) of a group G. It was introduced by Issai Schur (1904) in his work on projective representations.
Read more about Schur Multiplier: Examples and Properties, Relation To Projective Representations, Relation To Central Extensions, Relation To Efficient Presentations, Relation To Topology, Applications
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