chain rule


Definition of chain rule

: a mathematical rule concerning the differentiation of a function of a function (such as f [u(x)]) by which under suitable conditions of continuity and differentiability one function is differentiated with respect to the second function considered as an independent variable and then the second function is differentiated with respect to its independent variable

Examples of chain rule in a Sentence

Recent Examples on the Web The algorithm is called backpropagation because error gradients from later layers in a network are propagated backwards and used (along with the chain rule from calculus) to calculate gradients in earlier layers. Timothy B. Lee, Ars Technica, "How computers got shockingly good at recognizing images," 18 Dec. 2018 Honest nodes following the longest-chain rule switch to recognizing the grey and orange blocks as valid, discarding the previously official yellow and green blocks. Timothy B. Lee, Ars Technica, "Want to really understand how bitcoin works? Here’s a gentle primer," 15 Dec. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'chain rule.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of chain rule

circa 1937, in the meaning defined above

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The first known use of chain rule was circa 1937

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Cite this Entry

“Chain rule.” Dictionary, Merriam-Webster, Accessed 19 Sep. 2020.

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