A random variable is one whose value is unknown or a function that assigns values to each of an experiment’s outcomes. A random variable can be discrete or continuous.

Claes Johnson, , Convergence of a Fully Discrete Scheme for Two-Dimensional Neutron Transport, SIAM Journal on Numerical Analysis, Vol. 20, No. 5 (Oct., 1983), pp. 951-966 ...

Research in quantum information processing has followed two different directions: the use of discrete variables (qubits) and that of high-dimensional, continuous-variable Gaussian states (coherent ...

The existence and stability of stable rotating solutions (spiral waves) in a discrete system of coupled phase models is proven. Monotone methods are used to obtain existence and qualitative features ...