= Poincaré–Hopf theorem
{wiki=Poincaré–Hopf_theorem}
The Poincaré–Hopf theorem is a fundamental result in differential topology that relates the topology of a compact manifold to the behavior of vector fields defined on it. Specifically, it provides a formula for the Euler characteristic of a manifold in terms of the zeros of a smooth vector field on that manifold. Here's a more detailed breakdown of the theorem’s key concepts: 1. **Setting**: Let \\( M \\) be a compact, oriented \\( n \\)-dimensional manifold without boundary.
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