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scientific article; zbMATH DE number 5055052 - MaRDI portal

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zbMath1101.20301MaRDI QIDQ5487254

Akihiro Yamamura

Publication date: 19 September 2006

Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.

zbMATH Keywords

presentations generators HNN extensions embedding theorems group extensions embedding problems groupoids normal form theorems van Kampen diagrams partial automorphisms trace products inverse semigroup actions E-unitary coextensions pseudo-commutative identities

Mathematics Subject Classification ID

Subgroup theorems; subgroup growth (20E07) Generators, relations, and presentations of groups (20F05) Free products of groups, free products with amalgamation, Higman-Neumann-Neumann extensions, and generalizations (20E06) Inverse semigroups (20M18) Cancellation theory of groups; application of van Kampen diagrams (20F06)

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