Linearizability of d-webs, d \geq 4, on two-dimensional manifolds

Maks A. Akivis, Vladislav V. Goldberg, Valentin V. Lychagin

We find d - 2 relative differential invariants for a d-web, d \geq 4, on a two-dimensional manifold and prove that their vanishing is necessary and sufficient for a d-web to be lin…