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more accurate and faster lgamma, and use a more standard branch cut #18330

Merged
merged 10 commits into from
Sep 7, 2016
Merged

more accurate and faster lgamma, and use a more standard branch cut #18330

merged 10 commits into from
Sep 7, 2016

Commits on Sep 2, 2016

  1. more accurate and faster lgamma, and use a more standard branch cut f… 

    …or real(x)<0
    @stevengj
    stevengj committed Sep 2, 2016
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  2. more tests

    @stevengj
    stevengj committed Sep 2, 2016
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  3. use trick from Hare (1997) to compute log(prod of shifts) rather than… 

    … sum(logs of shifts) with the correct branch cut
    @stevengj
    stevengj committed Sep 2, 2016
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  4. even more tests

    @stevengj
    stevengj committed Sep 2, 2016
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  5. whoops, use 1e14 and not 10^14 to avoid integer overflow on 32-bit Wi… 

    …ndows
    @stevengj
    stevengj committed Sep 2, 2016
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  6. fix accuracy near zero at z=2

    @stevengj
    stevengj committed Sep 2, 2016
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  7. update manual for lgamma

    @stevengj
    stevengj committed Sep 2, 2016
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  8. news for lgamma changes

    @stevengj
    stevengj committed Sep 2, 2016
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  9. can use a lower-degree Taylor series around z=2 because the coefficie… 

    …nts decrease faster
    @stevengj
    stevengj committed Sep 2, 2016
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Commits on Sep 3, 2016

  1. linewrap poly coefs

    @stevengj
    stevengj committed Sep 3, 2016
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