Natural SciencesArchitectural RepresentationAlgebraAbstract AlgebraGalois TheoryGroup TheoryInvariant TheoryLie GroupsTopological GroupsComputational Invariant TheoryInvariant Theory ComputationInvariantsModular Invariant TheoryTopological Group Extensions
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P. M. Cohn, Wilhelm Magnus, A. Karrass et al. · American Mathematical Monthly · 1967 · 1.3K citations
Mose Newman · Journal of the Franklin Institute · 1967 · 654 citations
On Torsion-Free Groups with Infinitely Many Ends
John R. Stallings · Annals of Mathematics · 1968 · 422 citations