Abstract.
We study the global analytic properties of the solutions of a particular family of Painlevé VI equations with the parameters β=γ=0, δ=1/2 and 2α=(2μ-1)2 with arbitrary μ, 2μ≠∈ℤ. We introduce a class of solutions having critical behaviour of algebraic type, and completely compute the structure of the analytic continuation of these solutions in terms of an auxiliary reflection group in the three dimensional space. The analytic continuation is given in terms of an action of the braid group on the triples of generators of the reflection group. We show that the finite orbits of this action correspond to the algebraic solutions of our Painlevé VI equation and use this result to classify all of them. We prove that the algebraic solutions of our Painlevé VI equation are in one-to-one correspondence with the regular polyhedra or star-polyhedra in the three dimensional space.
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Oblatum 19-III-1999 & 25-XI-1999¶Published online: 21 February 2000
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Dubrovin, B., Mazzocco, M. Monodromy of certain Painlevé–VI transcendents and reflection groups. Invent. math. 141, 55–147 (2000). https://doi.org/10.1007/PL00005790
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DOI: https://doi.org/10.1007/PL00005790