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math.AT2012★ 1 cited
Open subgroups of free topological groups
Jeremy Brazas
The theory of covering spaces is often used to prove the Nielsen-Schreier theorem, which states that every subgroup of a free group is free. We apply the more general theory of sem…
math.GT2012
Thick Spanier groups and the first shape group
Jeremy Brazas, Paul Fabel
We develop a new route through which to explore , the kernel of the -shape group homomorphism determined by a general space , and establish, for each locally path…