2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/58610The Riemann-Liouville fractional integrals and derivatives are generalized for cases when fractional exponent $d$ are functions of space and times coordinates (i.e. $d=d({\bf r}(t),t)$).Classical Analysis and ODEsMathematical PhysicsGeneralized Riemann - Liouville fractional derivatives for multifractal setstext