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1. CJM 2011 (vol 63 pp. 755)

Chu, Kenneth C. K.
 On the Geometry of the Moduli Space of Real Binary Octics The moduli space of smooth real binary octics has five connected components. They parametrize the real binary octics whose defining equations have \$0,\dots,4\$ complex-conjugate pairs of roots respectively. We show that each of these five components has a real hyperbolic structure in the sense that each is isomorphic as a real-analytic manifold to the quotient of an open dense subset of \$5\$-dimensional real hyperbolic space \$\mathbb{RH}^5\$ by the action of an arithmetic subgroup of \$\operatorname{Isom}(\mathbb{RH}^5)\$. These subgroups are commensurable to discrete hyperbolic reflection groups, and the Vinberg diagrams of the latter are computed. Keywords:real binary octics, moduli space, complex hyperbolic geometry, Vinberg algorithmCategories:32G13, 32G20, 14D05, 14D20

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