Logarithmic relative-systole alternative for quasi-optimal pseudomanifolds

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Let (Pn)(P_n) be a sequence of quasi-optimal pseudomanifolds representing n an\,\mathbf a, and let φn:π1(Pn)→π1(X)\varphi_n:\pi_1(P_n)\to\pi_1(X) be the induced homomorphism. Write sys⁡φn(Pn)\operatorname{sys}_{\varphi_n}(P_n) for the relative systole and σφn(Pn)\sigma_{\varphi_n}(P_n) for the corresponding relative systolic volume. Logarithmic relative-systole alternative. One should have either

sys⁡φn(Pn)≳log⁡n\operatorname{sys}_{\varphi_n}(P_n)\gtrsim\log n

or

σφn(Pn)≲nlog⁡mn.\sigma_{\varphi_n}(P_n)\lesssim\frac{n}{\log^m n}.

This alternative is proposed after deriving an entropy estimate conditional on the local volume-growth conjecture. It is a heuristic direction in the paper, and no resolution is supplied.

References

Primary source

Ivan Babenko and Stephane Sabourau, “Volume entropy semi-norm”, arXiv:1909.10803 (2019).

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