Extra discrete representations conjecture for complex reflection triangle groups

Let (p,q,r)(p,q,r) be a triple with pqrp\leq q\leq r, let ρt(p,q,r)\rho_t(p,q,r) be the associated family, and classify the triple as type A or type B according to the critical-interval definition. Extra representations conjecture. If (p,q,r)(p,q,r) has type A, then there is a countable collection of parameters t1,t2,t3,t_1,t_2,t_3,\ldots for which ρtj(p,q,r)\rho_{t_j}(p,q,r) has infinite image, is discrete, and is not injective. If (p,q,r)(p,q,r) has type B, then every infinite discrete representation ρt(p,q,r)\rho_t(p,q,r) is an embedding and is covered by the discreteness interval conjecture. The proviso excluding finite-image degeneracies is necessary because the source notes an always-available quotient onto Z/2\mathbb{Z}/2.

Sources & referencesView supporting material

Primary source

Richard Evan Schwartz, “Complex hyperbolic triangle groups”, arXiv:math/0304268 (2003).

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