AMU conjecture on detecting pseudo-Anosov mapping classes by TQFT representations

From papers

Let Σ\Sigma be the surface with mapping class group Γ\Gamma, and let ρk\rho_k denote the level-kk TQFT representation of Γ\Gamma. A mapping class is Pseudo-Anosov if it is pseudo-Anosov, and it is reducible with pseudo-Anosov pieces if its canonical reduction has pseudo-Anosov components.

AMU conjecture. For a mapping class ϕΓ\phi\in\Gamma, ϕ\phi is Pseudo-Anosov or reducible with Pseudo-Anosov pieces if and only if ρk(ϕ)\rho_k(\phi) is infinite order for large enough kk.

This conjecture proposes that the asymptotic order of TQFT representations detects precisely the mapping classes having pseudo-Anosov dynamics on at least one component. The supplied text presents it as an expectation, and gives no resolution.

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Sources & referencesView supporting material

Primary source

Jorgen Ellegaard Andersen, “The Nielsen-Thurston classification of mapping classes is determined by TQFT”, arXiv:math/0605036 (2006).

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