Many built-in mathematical and logical operators, functions, and constants can be used to specify parameters, variables, equation coefficients, and material properties. These tables list the unary and binary operators (Table 5-2 and Table 5-3), mathematical and numerical constants (Table 5-6), mathematical functions (Table 5-7), physical constants predefined as variables (Table 5-8), special operators (Table 5-9), and user-defined functions (Table 5-17) that are available in COMSOL Multiphysics. See also Nonlocal Couplings and Coupling Operators for information about coupling operators.