PreprintCC BY-NC-SA 4.0arXiv
χ-Independence for BPS Invariants of Warped Local Curves
Abstract
A well-known conjecture of Toda's asserts that the BPS invariants associated to a Calabi--Yau threefold are independent of the chosen Euler characteristic. We answer the question in the affirmative for a certain class of local surfaces, which we call warped local curves. Along the way we show that the moduli stack of sheaves on a warped local curve can be written as the global critical locus of a function. We also show that the moduli stack of sheaves on a curve fibration over 𝔸1 is the global critical locus of a function.
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BibTeX
@misc{pavlakovic2026χindependence,
title = {{$χ$-Independence for BPS Invariants of Warped Local Curves}},
author = {Ana Pavlaković},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.20212},
eprint = {2610.20212},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.20212},
note = {CC BY-NC-SA 4.0},
}
RIS
TY - UNPB
TI - χ-Independence for BPS Invariants of Warped Local Curves
AU - Ana Pavlaković
PY - 2026
DA - 2026/10/14
PB - arXiv
DO - 10.48550/arxiv.2610.20212
UR - https://arxiv.org/abs/2610.20212
AB - A well-known conjecture of Toda's asserts that the BPS invariants associated to a Calabi--Yau threefold are independent of the chosen Euler characteristic. We answer the question in the affirmative for a certain class of local surfaces, which we call warped local curves. Along the way we show that the moduli stack of sheaves on a warped local curve can be written as the global critical locus of a function. We also show that the moduli stack of sheaves on a curve fibration over 𝔸^1 is the global critical locus of a function.
ER -