Informally, a dynamic system is any physical system that evolves with time (e.g., a pendulum, a planet orbiting the sun, the weather, etc). From a more mathematically precise perspective, one can ...

Journal of Operator Theory, Vol. 55, No. 2 (Spring 2006), pp. 295-310 (16 pages) We consider a condition for non-degenerate commuting squares of matrix algebras (finite dimensional von Neumann ...