单词	nabla (= nabla operator)
释义	nabla (= nabla operator) 纳布拉算子，哈密顿算子， 算子，拉普拉斯算子，梯度算子
随便看	residue of degree n modulo m residue of order n residue of the n-th power residue ring residue system residue theorem resistance distance non-monotone non-monotonic function non-monotonic logic non-movable singularity nonnegative nonnegative characteristic form nonnegative combination nonnegative definite nonnegative definite kernel nonnegative definite matrix nonnegative definiteness nonnegative definite quadratic estimate nonnegative divisor nonnegative element nonnegative function nonnegative integer nonnegative integral kernel nonnegative manifold

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