 2.1 Definitions and Elementary Properties

Chapter 2 contributors: Frank W. J. Olver, Roderick S. C. Wong. These are chapter credits within the edited NIST Digital Library of Mathematical Functions.^[ref]

Publisher: National Institute of Standards and Technology.

Online text: dlmf.nist.gov/2.1

Online reference release inspected: version 1.2.8, 15 September 2026. This date identifies the site release.

Cited passages: NIST Digital Library of Mathematical Functions, §2.1(iii), equations 2.1.13–2.1.15: fixed-order inverse-power expansions and uniqueness; §2.1(v): generalized asymptotic scales and expansions.