Quantum calculus, sometimes called calculus without limits, is equivalent to traditional infinitesimal calculus without the notion of limits. The two types of calculus in quantum calculus are q -calculus and h -calculus. The goal of both types is to find "analogs" of mathematical objects, where, after taking a certain limit, the original object is returned. In q -calculus, the limit as q tends to 1 is taken of the q -analog. Likewise, in h -calculus, the limit as h tends to 0 is taken of the h -analog. The parameters q and h can be related by the formula q = e h .