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arXiv · 2107.08354

$\mathrm{K}$-cowaist on complete foliated manifolds

Guangxiang Su·Xiangsheng Wang
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Abstract

Let $(M,F)$ be a connected (not necessarily compact) foliated manifold carrying a complete Riemannian metric $g^{TM}$. We generalize Gromov's $\mathrm{K}$-cowaist using the coverings of $M$, as well as defining a closely related concept called the $\widehat{\mathrm{A}}$-cowaist. Let $k^F$ be the associated leafwise scalar curvature of $g^F = g^{TM}|_F$. We obtain some estimates on $k^F$ using these two concepts. In particular, assuming that the generalized $\mathrm{K}$-cowaist is infinity and either $TM$ or $F$ is spin, we show that $\inf(k^F)\leq 0$.

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Guangxiang Su, Xiangsheng Wang. 2021-07-18. $\mathrm{K}$-cowaist on complete foliated manifolds. https://doi.org/10.2140/agt.2025.25.2037

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