Fabijonas, B.
, Lozier, D.
and Rappoport, J.
(2003),
Algorithms and Codes for the Macdonald Function: Recent Progress and Comparisons, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD (Accessed July 15, 2026)
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Algorithms and Codes for the Macdonald Function: Recent Progress and Comparisons
Published
Author(s)
B R. Fabijonas, , J M. Rappoport
Abstract
The modified Bessel function KiŅχ, also known as the Macdonald function, finds application in the Kontorovich-Lebedev integral transform when χ and Ņ are real and positive. In this paper, a comparison of three codes for computing this function is made. These codes differ in algorithmic approach, timing, and regions of validity. One of them can be tested independently of the other two through Wronskian checks, and therefore is used as a standard against which the others are compared.Citation
NIST Interagency/Internal Report (NISTIR) - 6596
Report Number
6596
Volume
161
NIST Pub Series
Pub Type
NIST Pubs
Keywords
Bessel functions, computation of special functions, Macdonald function
Citation
Issues
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Created January 31, 2003, Updated October 12, 2021