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The co-Hopfian property of surface braid groups
Published 14 Jun 2010 in math.GR and math.GT | (1006.2599v3)
Abstract: Let g and n be integers at least two, and let G be the pure braid group with n strands on a closed orientable surface of genus g. We describe any injective homomorphism from a finite index subgroup of G into G. As a consequence, we show that any finite index subgroup of G is co-Hopfian.
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