A Frobenius Theorem on Fr\'echet Manifolds
Abstract
We investigate the integrability of Fr\'{e}chet tangent distributions on Fr\'{e}chet manifolds. We introduce the local well-posedness Condition W for split tangent subbundles, which reduces the local integrability problem to solving initial value problems with parameters whose solutions define curves tangent to the distribution. By applying a variational approach to establish the existence and uniqueness of these solutions, we prove a Frobenius theorem stating that involutivity and Condition W are sufficient for integrability. This yields the existence of a unique maximal foliation of the manifold. Furthermore, we provide a dual formulation of the theorem using differential forms, which characterizes the algebraic conditions for integrability via the exterior derivative of the subbundle's local annihilator.
Keywords
Cite
@article{arxiv.2604.22472,
title = {A Frobenius Theorem on Fr\'echet Manifolds},
author = {Kaveh Eftekharinasab},
journal= {arXiv preprint arXiv:2604.22472},
year = {2026}
}