HNN extension

basic construction of combinatorial group theory

Wikidata entity: Q3062521



P31 instance of ... Q24034552 (mathematical concept) mathematical concept
P138 named after ... Q71633 (Hanna Neumann) Hanna Neumann
P138 named after ... Q72078 (Bernhard Neumann) Bernhard Neumann
P138 named after ... Q979194 (Graham Higman) Graham Higman

External Ids
P646Freebase ID/m/084zs2
P6366Microsoft Academic ID (discontinued)168769410

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