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arXiv · 2609.17720

On Logarithmic Donaldson-Thomas invariants for local Calabi-Yau $4$-folds

Xiaolong Liu
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Abstract

In this paper, we study logarithmic Donaldson-Thomas invariants for local log Calabi-Yau $4$-folds with simple normal crossing divisors. Using the family version of shifted Lagrangian classes announced by Khan-Kinjo-Park-Safronov, we construct relative and family logarithmic $\mathsf{DT}_4$-theories for logarithmic Hilbert schemes of curves, and prove a degeneration formula. For logarithmic Hilbert schemes of points, we construct virtual classes and prove a degeneration formula in Chow groups; in particular, it is independent of shifted Lagrangian classes. Finally, combining our degeneration formula with logarithmic cobordism, we explicitly compute the zero-dimensional logarithmic $\mathsf{DT}_4$-invariants for local surface snc pairs.

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BibTeXRIS

Xiaolong Liu. 2026-09-15. On Logarithmic Donaldson-Thomas invariants for local Calabi-Yau $4$-folds. https://arxiv.org/abs/2609.17720

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