Optimality conditions, General reference works (handbooks, dictionaries, bibliographies, etc.) pertaining to systems and control theory, General reference works (handbooks, dictionaries, bibliographies, etc.) pertaining to calculus of variations and optimal control, Applied Mathematics, Control/observation systems governed by functional relations other than differential equations (such as hybrid and switching systems), General systems, General reference works (handbooks, dictionaries, bibliographies, etc.) pertaining to information and communication theory, Information theory (general), Analysis