Multi-homogeneous Bézout theorem

In algebra and algebraic geometry, the multi-homogeneous Bézout theorem is a generalization to multi-homogeneous polynomials of Bézout's theorem, which counts the number of isolated common zeros of a set of homogeneous polynomials. This generalization is due to Igor Shafarevich.

Source: Wikipedia — Multi-homogeneous Bézout theorem (CC BY-SA 4.0)