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Quantum calculus
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Quantum calculus : ウィキペディア英語版
Quantum calculus
Quantum calculus, sometimes called calculus without limits, is equivalent to traditional infinitesimal calculus without the notion of limits. It defines "q-calculus" and "h-calculus", where h ostensibly stands for Planck's constant while ''q'' stands for quantum. The two parameters are related by the formula
:q = e^ = e^ \,
where \scriptstyle \hbar = \frac \, is the reduced Planck constant.
==Differentiation==

In the q-calculus and h-calculus, differentials of functions are defined as
:d_q(f(x)) = f(qx) - f(x) \,
and
:d_h(f(x)) = f(x + h) - f(x) \,
respectively. Derivatives of functions are then defined as fractions by the q-derivative
:D_q(f(x)) = \frac = \frac
and by
:D_h(f(x)) = \frac = \frac
In the limit, as h goes to 0, or equivalently as q goes to 1, these expressions take on the form of the derivative of classical calculus.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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