单词	differential operator
释义	differential operator Generally, any operator involving derivatives or partial derivatives. In particular, the operator del , where i, j, k are unit vectors in directions Ox, Oy, Oz, and are the partial derivatives of the function with respect to x, y, z. Note that the operator del does not behave as vectors do (see appendix 16). See also curl, divergence, gradient, Laplacian.
随便看	above abscissa absolute error absolute frequency absolute geometry absolutely continuous absolutely convergent series absolutely summable absolute value absorbing set absorbing state absorption laws abstract algebra abstraction abundant number acceleration acceleration–time graph acceptance region acceptance sampling accessibility accumulation point accuracy accurate (correct) to n decimal places accurate (correct) to n significant figures Acheson, David

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