Template:Are You Sure/October 8

• ... that mathematician Joseph Wedderburn showed that every semisimple algebra finite-dimensional can be constructed as a direct sum of simple algebras, and that every simple algebra is isomorphic to a matrix algebra for some division ring; and that the Artin–Wedderburn theorem generalizes this result with the ascending chain condition?

• ... that theoretical physicist Tullio Regge introduced Regge calculus, a simplicial formulation of general relativity; and that Regge calculus was the first discrete gauge theory suitable for numerical simulation, and an early relative of lattice gauge theory?