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The **Digital Library of Mathematical Functions** (**DLMF**) is an online project at the National Institute of Standards and Technology (NIST) to develop a database of mathematical reference data for special functions and their applications. It is intended as an update of *Abramowitz's and Stegun's Handbook of Mathematical Functions* (A&S).^{[1]} It was published online^{[2]} on 7 May 2010, though some chapters appeared earlier. In the same year it appeared at Cambridge University Press under the title * NIST Handbook of Mathematical Functions*.

In contrast to A&S, whose initial print run was done by the U.S. Government Printing Office and was in the public domain, NIST asserts that it holds copyright to the DLMF under Title 17 USC 105 of the U.S. Code.^{[4]}

**^**Boisvert, Ronald F.; Clark, Charles W.; Lozier, Daniel W.; Olver, Frank William John (2011). "A Special Functions Handbook for the Digital Age" (PDF).*Notices of the American Mathematical Society*.**58**(7): 905–911. Archived (PDF) from the original on 2021-09-09. Retrieved 2016-03-13.**^**"NIST Digital Library of Mathematical Functions". National Institute of Standards and Technology (NIST). Retrieved 2023-07-24.**^**Olver, Frank William John; Lozier, Daniel W.; Boisvert, Ronald F.; Clark, Charles W., eds. (2010).*NIST Handbook of Mathematical Functions*. National Institute of Standards and Technology (NIST), U.S. Department of Commerce, Cambridge University Press. ISBN 978-0-521-19225-5. MR 2723248. [1]**^**"DLMF: Notices". NIST. Retrieved 2010-12-28.

- Cipra, Barry Arthur (1998-03-08). "A New Testament for Special Functions?".
*SIAM News*. SIAM. Archived from the original on 2007-07-15. - Lozier, Daniel W. (October 1997) [September 1997]. "Toward a Revised NBS Handbook of Mathematical Functions" (PDF). National Institute of Standards and Technology (NIST). pp. 2089–9. CiteSeerX 10.1.1.65.5096. NISTIR 6072. Archived (PDF) from the original on 2021-12-28. [2] (8 pages)
- "NIST Releases Preview of Much-Anticipated Online Mathematics Reference". ScienceDaily. 2008-06-27. Archived from the original on 2021-02-11. Retrieved 2021-12-28.
- "Birth of a Classic … Take Two" (Video). National Institute of Standards and Technology, United States Department of Commerce. 2010-05-11. Archived from the original on 2021-12-21.

- NIST Digital Library of Mathematical Functions
- Known errata in NIST DLMF