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Who was the first person to develop the heat equation?

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Who was the first person to develop the heat equation?

(a) Joseph Fourier

(b) Galileo Galilei

(c) Daniel Gabriel Fahrenheit

(d) Robert Boyle

This question was posed to me during an interview.

My enquiry is from Derivation and Solution of Two-dimensional Heat Equation topic in section Applications of Partial Differential Equations of Engineering Mathematics

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Correct answer is (a) Joseph Fourier

To elaborate: The heat equation was first put forth by Jean-Baptiste Joseph Fourier (21 March 1768 – 16 May 1830) in 1822. He was a French mathematician and physicist born in Auxerre. It was developed to describe heat flow.

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