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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) §13.2 Partial Derivatives, #42 · Multivariable Calculus · Partial derivatives

Suppose

Suppose $\partial f / \partial t = \partial f / \partial x$ . Show that $\partial^{2} f / \partial t^{2} = \partial^{2} f / \partial x^{2}$ .

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Gilbert Strang, Calculus, 3rd edition (Wellesley-Cambridge Press; MIT OpenCourseWare RES.18-001) · §13.2 Partial Derivatives, #42

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