We derive a cancellation property satisfied by the derivatives of the Green's functions for the Laplace operator corresponding to Dirichlet and Neumann boundary conditions on bounded sets in ⁿ. The main result is derived in a broader, self-contained exposition which includes construction of and basic pointwise bounds for the Green's functions and their derivatives. We also give an application of the cancellation property to a problem in fluid mechanics.
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David Hoff (2024) studied this question.
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