Partial Differentiation

Japanese: 偏微分 - へんびぶん
Partial Differentiation
When we have a function f ( x1 , x2 , ..., x(/n)) of n variables x1 , x2 , ..., x(/n), fixing the values ​​of the n-1 variables excluding one of the variables, for example x(/i), and differentiating the resulting function of only x(/i) with respect to x(/i) is called partially differentiating the function f with respect to x(/i). The differential coefficient or derivative obtained in this way is called the partial differential coefficient or partial derivative with respect to x(/i), and is written as ∂f/∂x(/i) or (Equation 1). When partial differential coefficients with respect to all variables of a function exist at a point or in a certain range, the function is said to be partially differentiable at that point or range. →Differentiation/Total Differentiation→Related TopicsKovalevskaya

Source : Heibonsha Encyclopedia About MyPedia Information

Japanese:
n個の変数x1,x2,…,x(/n)の関数f(x1,x2,…,x(/n))があるとき,変数のうちの一つ,たとえばx(/i)を除いた他のn−1個の変数の値を固定し,これによって生じるx(/i)だけの関数をx(/i)について微分することを,関数fをx(/i)で偏微分するという。これによって得られる微分係数,導関数をx(/i)に関する偏微分係数,偏導関数といい,∂f/∂x(/i)または(式1)と書く。一点またはある範囲で,ある関数のすべての変数に関する偏微分係数が存在するとき,その関数はその点または範囲で偏微分可能であるという。→微分/全微分
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