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  2. Green's identities - Wikipedia

    en.wikipedia.org/wiki/Green's_identities

    Green's third identity derives from the second identity by choosing φ = G, where the Green's function G is taken to be a fundamental solution of the Laplace operator, ∆.. This means that: (,) = .

  3. Vector calculus identities - Wikipedia

    en.wikipedia.org/wiki/Vector_calculus_identities

    4.1.6 Third derivatives. ... Download as PDF; Printable version; In other projects Wikidata item; ... For example, Green's first identity becomes

  4. Green's relations - Wikipedia

    en.wikipedia.org/wiki/Green's_relations

    For elements a and b of S, Green's relations L, R and J are defined by . a L b if and only if S 1 a = S 1 b.; a R b if and only if a S 1 = b S 1.; a J b if and only if S 1 a S 1 = S 1 b S 1.; That is, a and b are L-related if they generate the same left ideal; R-related if they generate the same right ideal; and J-related if they generate the same two-sided ideal.

  5. Green's function - Wikipedia

    en.wikipedia.org/wiki/Green's_function

    Green's functions are also useful tools in solving wave equations and diffusion equations. In quantum mechanics, Green's function of the Hamiltonian is a key concept with important links to the concept of density of states. The Green's function as used in physics is usually defined with the opposite sign, instead.

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  7. Invariants of tensors - Wikipedia

    en.wikipedia.org/wiki/Invariants_of_tensors

    The separation of a tensor into a component that is a multiple of the identity and a traceless component is standard in hydrodynamics, where the former is called isotropic, providing the modified pressure, and the latter is called deviatoric, providing shear effects.

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