==Nature of the fractional derivative==An important point is that the fractional derivative at a point "x" is a "local property" only when "a" is an integer; in non-integer cases we cannot say that the fractional derivative at "x" of a function "f" depends only on values of "f" very near "x", in the way that integer-power derivatives certainly do.
==Nature of the fractional derivative==An important point is that the fractional derivative at a point "x" is a "local property" only when "a" is an integer; in non-integer cases we cannot say that the fractional derivative at "x" of a function "f" depends only on values of "f" very near "x", in the way that integer-power derivatives certainly do.