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differential operator

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noun Mathematics.
  1. a function, usually expressed as a polynomial, that indicates linear combinations of the derivatives of the expression on which it operates.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for differential operator

differential operator

noun
  1. any operator involving differentiation, such as the mathematical operator del ∇, used in vector analysis, where ∇ = i ∂/∂ x + j ∂/∂ y + k ∂/∂ z, i, j, and k being unit vectors and ∂/∂ x, ∂/∂ y, and ∂/∂ z the partial derivatives of a function in x, y, and z
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