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All roots of unity are detected by the A-polynomial

Eric Chesebro

math.GTarXiv:math/0411205

Abstract

For an arbitrary positive integer n, we construct infinitely many one-cusped hyperbolic 3-manifolds where each manifold's A-polynomial detects every n-th root of unity. This answers a question of Cooper, Culler, Gillet, Long, and Shalen as to which roots of unity arise in this manner.

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