Algebraicity or infinite local monodromy for integral solutions at singular points

Let X/CX/\mathbb{C} be a smooth projective curve, let DXD\subset X be a reduced effective divisor, and let (E,:EEΩX1(logD))(\mathscr{E},\nabla:\mathscr{E}\to\mathscr{E}\otimes\Omega_X^1(\log D)) be a logarithmic flat bundle on (X,D)(X,D). For xDx\in D, let ss be an integral formal flat section at xx. Singular-point conjecture. Either ss is algebraic, or (E,)(\mathscr{E},\nabla) has infinite monodromy at xx. This is presented as a local prediction of the main conjecture; the source gives no resolution.

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Primary source

Yeuk Hay Joshua Lam and Daniel Litt, “Algebraicity and integrality of solutions to differential equations”, arXiv:2501.13175 (2025).

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