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Dirichlet

American  
[dir-i-kley, dee-ree-kley] / ˌdɪr ɪˈkleɪ, ˌdi riˈkleɪ /

noun

  1. Peter Gustav Lejeune 1805–59, German mathematician.


Dirichlet British  
/ diriˈkleː /

noun

  1. Peter Gustav Lejeune (ˈpeːtər ˈɡʊstaf ləˈʒœn). 1805–59, German mathematician, noted for his work on number theory and calculus

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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They can be used, for example, to help solve classic boundary value problems such as the Dirichlet problem or the Neumann problem.

From Science Daily • Jan. 7, 2026

The pigeonhole principle is usually attributed to Peter Gustav Lejeune Dirichlet, who lived about 200 years after Leurechon.

From Scientific American • Mar. 20, 2023

This bit of common sense, sometimes termed the pigeonhole or Dirichlet drawer principle, can occasionally be used to derive claims that are not so obvious.

From "Innumeracy: Mathematical Illiteracy and Its Consequences" by John Allen Paulos

The deficiency cannot be removed except by a process of the same nature as that afterwards applied by Dirichlet.

From Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 6 "Foraminifera" to "Fox, Edward" by Various

The first completely satisfactory investigation is due to Dirichlet; his first memoir appeared in Crelle’s Journal for 1829, and the second, which is a model of clearness, in Dove’s Repertorium der Physik.

From Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 6 "Foraminifera" to "Fox, Edward" by Various