The history of this important theorem is described by Collingwood and Lohwater.

One of the most important theorems of complex analysis is that holomorphic functions are analytic.

Jon Folkman contributed important theorems in many areas of combinatorics.

A computer would discover and prove an important new mathematical theorem.

The Dandelin spheres can be used to prove at least two important theorems.

A year later, he proved two important theorems, which showed Hibert's program to be unattainable in its original form.

The Whitney numbers are connected with a lot of important combinatorial theorems.

This important theorem states that any square matrix A satisfies its own characteristic equation.

A number of important theorems in early group theory is due to Cauchy.

He established several important theorems (all called Chasles' theorem).