Lyndon, Roger C.; Newman, Morris Commutators as products of squares. (English) Zbl 0268.20023 Proc. Am. Math. Soc. 39, 267-272 (1973). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 ReviewCited in 8 Documents MSC: 20F05 Generators, relations, and presentations of groups 20F10 Word problems, other decision problems, connections with logic and automata (group-theoretic aspects) 20E10 Quasivarieties and varieties of groups 20H05 Unimodular groups, congruence subgroups (group-theoretic aspects) PDF BibTeX XML Cite \textit{R. C. Lyndon} and \textit{M. Newman}, Proc. Am. Math. Soc. 39, 267--272 (1973; Zbl 0268.20023) Full Text: DOI References: [1] Karl Goldberg, Unimodular matrices of order 2 that commute, J. Washington Acad. Sci. 46 (1956), 337 – 338. [2] A. Karrass and D. Solitar, On free products, Proc. Amer. Math. Soc. 9 (1958), 217 – 221. · Zbl 0089.01303 [3] Paul E. Schupp, On the substitution problem for free groups, Proc. Amer. Math. Soc. 23 (1969), 421 – 423. · Zbl 0186.03601 This reference list is based on information provided by the publisher or from digital mathematics libraries. Its items are heuristically matched to zbMATH identifiers and may contain data conversion errors. It attempts to reflect the references listed in the original paper as accurately as possible without claiming the completeness or perfect precision of the matching.