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Creators/Authors contains: "Vidussi, Stefano"

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  1. ; ; (, Journal of algebra)
    We show that a conjecture of Putman–Wieland, which posits the nonexistence of finite orbits for higher Prym representations of the mapping class group, is equivalent to the existence of surface-by-surface and surface-by-free groups which do not virtually algebraically fiber. While the question about the existence of such groups remains open, we will show that there exist free-by-free and free-by-surface groups which do not algebraically fiber (hence fail to be virtually RFRS) 
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    Accepted Manuscript Full Text Available
  2. ; ; ; ; (, Journal of the London Mathematical Society)
    Abstract We prove that if is the mapping torus group of an injective endomorphism of a free group (of possibly infinite rank), then every two‐generator subgroup of is either free or a (finitary) sub‐mapping torus. As an application we show that if is a fully irreducible atoroidal automorphism, then every two‐generator subgroup of is either free or has finite index in . 
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