bn:00245212n
Noun Concept
EL
schur πολλαπλασιαστή  καθολική κεντρική επέκταση  καθολική κεντρική προέκταση  καθολική τέλεια κεντρική επέκταση
EN
In mathematical group theory, the Schur multiplier or Schur multiplicator is the second homology group H 2 {\displaystyle H_{2}} of a group G. It was introduced by Issai Schur in his work on projective representations. Wikipedia
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