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zbMath0657.20047MaRDI QIDQ3804925

John R. Stallings

Publication date: 1987

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

zbMATH Keywords

semigroup diagrams pregroups cycle-free presentation cycle-free groups

Mathematics Subject Classification ID

Generators, relations, and presentations of groups (20F05) Free semigroups, generators and relations, word problems (20M05) Cancellation theory of groups; application of van Kampen diagrams (20F06)

Related Items (1)

The embedding of semigroup amalgams

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