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· 请问高等数学中div (grad u)中的div是什么意思？div，即散度（divergence）。其运算公式为：设某量场由 a (x,y,z) = p (x,y,z)i + q (x. y,z)j … · divj 和∇j和roth，j和h前面的符号代表什么意思？倒三角j可以写作gradj, 是j的梯度divj是j的散度roth是h的旋度参见高等数学中的场论初步 Pick up local maps and brochures, …...
