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单词 total differential
释义

Total differential


(Math.) the differential of a function of two or more variables, when each of the variables receives an increment. The total differential of the function is the sum of all the partial differentials.

See also: Differential

Total Differential


total differential

[′tōd·əl ‚dif·ə′ren·chəl] (mathematics) The total differential of a function of several variables, ƒ(x1, x2,…, xn ), is the function given by the sum of terms (∂ƒ/∂ xi ) dxi as i runs from 1 to n. Also known as differential.

Total Differential

 

The total differential of a function f(x, y, z, …) of several independent variables is

Define the increment of f as

∆ f = f(x +∆ x, y + ∆ y, z + ∆z,…)

- f(x, y, z,…)

then as

tends to zero, so does the difference Δf — df.

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更新时间:2024/12/22 16:21:31