P-derivation, also known as partial derivation, typically refers to the process of finding the derivative of a function with respect to one of its variables while keeping the other variables constant. This concept is commonly used in multivariable calculus, where functions depend on multiple variables. For a function \( f(x, y, z, \ldots) \), the partial derivative with respect to \( x \) is denoted as \( \frac{\partial f}{\partial x} \).
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