Feynman's Trick: Differentiation Under the Integral Sign Explained
By
Zen1th
Master baker tier. Every paragraph earns its place on the tray.
Summary
The article explains Feynman's trick, also known as differentiation under the integral sign or the Leibniz integral rule, which is a mathematical technique for evaluating integrals by introducing a parameter and differentiating with respect to it. The technique was popularized by physicist Richard Feynman, though it dates back to Leibniz. The article provides mathematical explanations, examples, and applications of this powerful integration method, along with historical context about how Feynman learned and used the technique.
Key quotes
· 3 pulledAmong a few other integral tricks and techniques, Feynman's trick was a strong reason that made me love evaluating integrals, and although the technique itself goes back to Leibniz being commonly known as the Leibniz integral rule, it was Richard Feynman who popularized it, which is why it is also referred to as Feynman's trick.
Here's an excerpt from his book, Surely You're Joking, Mr. Feynman:
a.k.a. Differentiation under the Integral Sign & Leibniz Integral Rule
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