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1: How to Cite
Your readers can then readily locate the item within the book or online (at http://dlmf.nist.gov/5.4.E1 in this example; see Permalinks & Reference numbers). … 1, it is quickly located in the book. … The direct correspondence between the reference numbers in the printed Handbook and the permalinks used online in the DLMF enables readers of either version to cite specific items and their readers to easily look them up again — in either version! The following table outlines the correspondence between reference numbers as they appear in the Handbook, and the URL’s that find the same item online. … For convenience, the permalink can be found in the pop-up ‘Info box’ associated with each item in the site.
2: Possible Errors in DLMF
Possible Errors in DLMF
We have strived for the utmost in correctness, clarity and accuracy, having validated each chapter with both internal and external experts. One source of confusion, rather than actual errors, are some new functions which differ from those in Abramowitz and Stegun (1964) by scaling, shifts or constraints on the domain; see the Info box (click or hover over the icon) for links to defining formula. There are also cases where browser bugs or poor fonts can be misleading; you can verify MathML display by comparing the to the images or TeXfound under Encodings in the Info boxes (see About MathML). Errors in the printed Handbook may already have been corrected in the online version; please consult Errata. …
3: 3.5 Quadrature
Similar results hold for the trapezoidal rule in the form …In Stenger (1993, Chapter 3) the rule (3.5.5) is considered in the framework of Sinc approximations (§3.3(vi)). … These also immediately yield the recurrence coefficients in (3.5.30_5). …In particular, by continuity in α and β , … All digits shown in the approximation in the final row are correct. …
4: Viewing DLMF Interactive 3D Graphics
Below we provide some notes and links to online material which might be helpful in viewing our visualizations, but please see our Disclaimer. … WebGL is supported in the current versions of most common web browsers. While WebGL reportedly works with Internet Explorer 11 in Windows 8. … In fact, we have not found a VRML/X3D browser or plugin that works consistently with our VRML/X3D visualization files in Linux. Linux users must view the visualizations in a WebGL-enabled browser. …
5: Foreword
That 1046-page tome proved to be an invaluable reference for the many scientists and engineers who use the special functions of applied mathematics in their day-to-day work, so much so that it became the most widely distributed and most highly cited NIST publication in the first 100 years of the institution’s existence. … Much has changed in the years since A&S was published. Certainly, advances in applied mathematics have continued unabated. …The online version, the NIST Digital Library of Mathematical Functions (DLMF), presents the same technical information along with extensions and innovative interactive features consistent with the new medium. … The production of these new resources has been a very complex undertaking some 10 years in the making. …
6: 3.12 Mathematical Constants
can be defined analytically in numerous ways, for example, …Other constants that appear in the DLMF include the base e of natural logarithms … For access to online high-precision numerical values of mathematical constants see Sloane (2003). …
7: Notices
Certain products, commercial and otherwise, are mentioned in the DLMF. … Other than the information described above which is collected from all visitors, we do not collect any information online from children. … Using special functions in applications often requires computing them. …We do this in two ways.
  • Index of Selected Software Within the DLMF Chapters

    Within each of the DLMF chapters themselves we will provide a list of research software for the functions discussed in that chapter. The purpose of these listings is to provide references to the research literature on the engineering of software for special functions. To qualify for listing, the development of the software must have been the subject of a research paper published in the peer-reviewed literature. If such software is available online for free download we will provide a link to the software.

    In general, we will not index other software within DLMF chapters unless the software is unique in some way, such as being the only known software for computing a particular function.

  • 8: 22.3 Graphics
    See accompanying text
    Figure 22.3.4: k = 0.999999 , - 3 K x 3 K , K = 7.9474 . Magnify
    See accompanying text
    Figure 22.3.8: k = 0.999999 , - 2 K x 2 K , K = 7.9474 . Magnify
    See accompanying text
    Figure 22.3.12: k = 0.999999 , - 2 K x 2 K , K = 7.9474 . Magnify
    In the graphics shown in this subsection height corresponds to the absolute value of the function and color to the phase. … In Figures 22.3.24 and 22.3.25, height corresponds to the absolute value of the function and color to the phase. …
    9: 22.16 Related Functions
    With q as in (22.2.1) and ζ = π x / ( 2 K ) , … In Equations (22.16.21)–(22.16.23), - K < x < K . In Equations (22.16.24)–(22.16.26), - 2 K < x < 2 K . … With E ( k ) and K ( k ) as in §19.2(ii) and x , …(Sometimes in the literature Z ( x | k ) is denoted by Z ( am ( x , k ) , k 2 ) .) …
    10: Frank W. J. Olver
     1924 in Croydon, U. …degrees in mathematics from the University of London in 1945, 1948, and 1961, respectively. … In 1992 he retired, and was appointed Professor Emeritus. … In 1989 the conference “Asymptotic and Computational Analysis” was held in Winnipeg, Canada, in honor of Olver’s 65th birthday, with Proceedings published by Marcel Dekker in 1990. … Most notably, he served as the Editor-in-Chief and Mathematics Editor of the online NIST Digital Library of Mathematical Functions and its 966-page print companion, the NIST Handbook of Mathematical Functions (Cambridge University Press, 2010). …