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- W2969401245 abstract "In the late 80s, V.~Arnold and V.~Vassiliev initiated the topological study of the space of real univariate polynomials of a given degree d and with no real roots of multiplicity exceeding a given positive integer. Expanding their studies, we consider the spaces of real monic univariate polynomials of degree d whose real divisors avoid sequences of root multiplicities taken from a given poset of compositions which is closed under certain natural combinatorial operations. In this paper, we concentrate on the fundamental group of such spaces. We find explicit presentations for the fundamental groups in terms of generators and relations and show that in a number of cases they are free with rank bounded from above by a quadratic function in d. We also show that the fundamental group stabilizes for d large. We further show that the fundamental groups admit an interpretation as special bordisms of immersions of 1-manifolds into the cylinder S^1 times R, whose images avoid the tangency patterns from the poset with respect to the generators of the cylinder." @default.
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- W2969401245 date "2019-08-21" @default.
- W2969401245 modified "2023-09-27" @default.
- W2969401245 title "Real polynomials with constrained real divisors. I. Fundamental groups" @default.
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