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specint(%ei(-t)*exp(-p*t),t) seems wrong #1576

Closed rtoy closed 2 days ago

rtoy commented 2 days ago

Imported from SourceForge on 2024-07-04 20:15:40 Created by rtoy on 2005-12-09 04:09:54 Original: https://sourceforge.net/p/maxima/bugs/834

(%i17) specint(%ei(-t)*exp(-p*t),t); (%o17) -2/((p+1)*sqrt(1-p/(p+1))*(sqrt(1-p/(p+1))+1))

This doesn't match formula 24, p. 178 in Tables of Integral Transforms:

-p^(-1)*log(p+1).

rtoy commented 2 days ago

Imported from SourceForge on 2024-07-04 20:15:41 Created by rtoy on 2006-02-12 18:14:22 Original: https://sourceforge.net/p/maxima/bugs/834/#aa98

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Fixed. F16P217TEST was incorrectly computing the parameters for 2F1.

rtoy commented 2 days ago

Imported from SourceForge on 2024-07-04 20:15:44 Created by rtoy on 2006-02-12 18:14:22 Original: https://sourceforge.net/p/maxima/bugs/834/#8d30