Linear Algebra and Matrix Theory by Evar D. Nering (2nd Edition, Hardcover) This revision of a well-known text includes more sophisticated mathematical material. A new section on applications provides an introduction to the modern treatment of calculus of several variables, and the concept of duality receives expanded coverage. Notations have been changed to correspond to more current usage. Evar Dare Nering (1921–2023) was an American mathematician known for his decades of teaching, foundational work in linear programming optimization, and early algorithms for solving the Rubik’s Cube.