which hold for "h" < 0 as well, thus allowing to obtain the antiderivative of any G-function as easily as the derivative. By choosing one or the other of the two results provided in either formula, one can always prevent the set of parameters in the result from violating the condition "a""k" − "b""j" ≠ 1, 2, 3, ... for "k" = 1, 2, ..., "n" and "j" = 1, 2, ..., "m" that is imposed by the definition of the G-function. Note that each pair of results becomes unequal in the case of "h" < 0.