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The Klein bottle group is not strongly verbally closed, though awfully close to being so
Published online by Cambridge University Press: 03 August 2020
Abstract
According to Mazhuga’s theorem, the fundamental group H of anyconnected surface, possibly except for the Klein bottle, is a retract of each finitely generated group containing H as a verbally closed subgroup. We prove that the Klein bottle group is indeed an exception but has a very close property.
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- © Canadian Mathematical Society 2020
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This work was supported by the Russian Foundation for Basic Research, project no. 19-01-00591.
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