Algorithm 743: WAPR: A FORTRAN routine for calculating real values of the W-function

We implement W-function approximation scheme described by Barry et al. A range of tests of the approximations is included so that the code can be assessed on any given machine. Users can calculate W(x) by specifying x itself or by specifying an offset from −exp(−1), the latter option necessitated by rounding errors that can arise for x close to −exp(−1). Results of running the code on a SUN workstation are included.


Published in:
Association of Computing Machinery Transactions on Mathematical Software, 21, 2, 172-181
Year:
1995
Keywords:
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 Record created 2005-12-09, last modified 2018-03-17

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