scientific article

zbMath0554.20003MaRDI QIDQ3216798

Gerhard Rosenberger

Publication date: 1984

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

zbMATH Keywords

free products of cyclic groupscongruence subgroups of the modular groupNielsen cancellation

Mathematics Subject Classification ID

Unimodular groups, congruence subgroups (group-theoretic aspects) (20H05) Free products of groups, free products with amalgamation, Higman-Neumann-Neumann extensions, and generalizations (20E06) Cancellation theory of groups; application of van Kampen diagrams (20F06)

Related Items (5)

Primitive and almost primitive elements of Schreier varieties ⋮ Generic, almost primitive and test elements of free Lie algebras ⋮ Primitive elements and automorphisms of free algebras of Schreier varieties ⋮ Primitive, almost primitive, test, and \(\Delta\)-primitive elements of free algebras with the Nielsen-Schreier property ⋮ Geometry of free products

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