Let Γ be a discrete cocompact subgroup of SL 2(ℂ). We conjecture that the quotient manifold X = SL 2(ℂ) / Γ contains infinitely many non-isogenous elliptic curves and prove this is indeed the case if Schanuel’s conjecture holds. We also prove it in the special case where Γ ∩ SL 2(∝) is cocompact in SL 2(ℝ).
Furthermore, we deduce some consequences for the geodesic length spectra of real hyperbolic 2- and 3-folds.