Rational approximations,software and test methods for sine and cosine integrals |
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| Authors: | Allan J. MacLeod |
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| Affiliation: | (1) Department of Mathematics and Statistics, University of Paisley, High St., PA1 2BE Paisley, Scotland |
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| Abstract: | Rational approximations to the sine integralSi(x) and cosine-integralCi(x) are developed which give an accuracy of 20sf. The robust construction of software for these functions is discussed, together with a test procedure for assessing the performance of such codes. Use of the tests discovers a major error in the netlib library FN codes forSi. Fortran versions of the codes and tests are available by electronic mail. |
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| Keywords: | Sine-integral cosine-integral rational software testing |
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