Lemma
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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §13.2 Partial Derivatives, #36 · Multivariable Calculus · Partial derivatives

Show that … satisfies the _heat equation_

Show that satisfies the _heat equation_ .
This is the temperature at position and time due to a point source of heat at , .

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §13.2 Partial Derivatives, #36

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