## Mathematics Subject Classification – MSC2010

Continuity and related questions (modulus of continuity, semicontinuity, discontinuities, etc.) [For properties determined by Fourier coefficients, see 42A16; for those determined by approximation properties, see 41A25, 41A27] 2322

Differentiation (functions of one variable): general theory, generalized derivatives, mean-value theorems [See also 28A15] 2421

Nondifferentiability (nondifferentiable functions, points of nondifferentiability), discontinuous derivatives 710