Mendson–Pereira jet-splitting conjecture for foliations on projective space

From papers

Let F\mathcal F be a codimension one foliation on Pn\mathbb P^n, with n3n\ge 3, and let NFN^*_{\mathcal F} be its conormal sheaf. Let B\nabla_B be the Bott connection on NFN^*_{\mathcal F}, and let PPn/F1(B)\mathcal{P}^1_{\mathbb P^n/\mathcal F}(\nabla_B) denote the first sheaf of transverse jets of this connection. A flat partial connection is a flat connection along the tangent directions of F\mathcal F. Mendson–Pereira jet-splitting conjecture. If

H0(Pn,ΩF1)=0,H^0(\mathbb P^n,\Omega^1_{\mathcal F})=0,

then PPn/F1(B)\mathcal{P}^1_{\mathbb P^n/\mathcal F}(\nabla_B) is isomorphic to the direct sum of two flat partial connections on line bundles. This is presented as a reformulation of Mendson and Pereira's conjecture; the source does not specify whether it has been resolved.

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Sources & referencesView supporting material

Primary source

Gabriel Fazoli, “Jets of flat partial connections II”, arXiv:2509.13510 (2025).

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