No exponentially convergent spectral-ratio families in the P≤ cases
No exponentially convergent spectral-ratio families in the P≤ cases
Let be a pseudo-Anosov mapping class and let denote its spectral ratio. For a surface and an infinite family of pseudo-Anosov mapping classes, a P case means that , while an E case means that . P versus E conjecture. In all P cases, there is no family of pseudo-Anosov mapping classes whose spectral ratios converge to one exponentially; equivalently, none of the P cases are E cases. The claim distinguishes polynomially slow convergence of the spectral ratio from exponential convergence in the surface-by-surface classification. The supplied text gives no resolution, so the assertion remains open.
Sources & referencesView supporting material
Primary source
Mark C. Bell and Saul Schleimer, “Slow north-south dynamics on PML”, arXiv:1512.00829 (2016).
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