Kähler-Ricci Flow is Symplectic Deflation plus an Exact Symplectic Deformation

Randall R. Van Why

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arXiv · 2610.24825

Kähler-Ricci Flow is Symplectic Deflation plus an Exact Symplectic Deformation

Randall R. Van Why

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Abstract

We demonstrate that Kähler-Ricci flow on a Fano surface decomposes as a symplectic deflation along a plurianticanonical divisor plus an exact symplectic deformation in the divisor complement. We apply this decomposition to the study of certain projective bundles. We establish the optimal decay rate in the setting of Song, Székelyhidi, and Weinkove for a family of toric metrics which match the cohomological profile of Kähler-Ricci flow. In doing so, we identify a $C^2$-obstruction to proving the optimal decay rate in the setting of ruled toric surfaces. We present these ideas as a new symplectic-topological approach to the study of Kähler-Ricci flow.

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BibTeX RIS

Randall R. Van Why. 2026-10-17. Kähler-Ricci Flow is Symplectic Deflation plus an Exact Symplectic Deformation. https://arxiv.org/abs/2610.24825

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