# \[Bug #659\] Math.lgamma not defined in -rcomplex

**URL:** <https://www.ruby-forum.com/t/bug-659-math-lgamma-not-defined-in-rcomplex/151251>\
**Category:** Development\
**Created:** [October 18, 2008, 9:34pm UTC](https://www.ruby-forum.com/t/bug-659-math-lgamma-not-defined-in-rcomplex/151251 "2008-10-18T21:34:35Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Shyouhei\_U](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/94ad74/32.png) [@Shyouhei\_U](https://www.ruby-forum.com/u/Shyouhei_U)\
**Post date:** [October 18, 2008, 9:34pm UTC](https://www.ruby-forum.com/t/bug-659-math-lgamma-not-defined-in-rcomplex/151251/1 "2008-10-18T21:34:35Z")

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Bug #659: Math.lgamma not defined in -rcomplex  
[http://redmine.ruby-lang.org/issues/show/659](http://redmine.ruby-lang.org/issues/show/659)

e$B5/I\<\<Te(B: Shyouhei U.  
e$B%9%F!\<%?%9e(B: Open, e$BM%@hEYe(B: Normal  
e$BC4Ev\<Te(B: Yukihiro M., e$B%+%F%4%je(B: lib

complexe$B$re(Brequiree$B$9$k$3$H$Ge(B::Mathe$B$NFC0[%a%=%C%I$,$$$/$D$+\>C$($^$9!#e(B

% ruby -rcomplex -ve’p Math.lgamma(1)’  
ruby 1.9.0 (2008-10-19 revision 17576) [x86\_64-linux]  
-e:1:in `<main>': undefined method `lgamma’ for CMath:Module  
(NoMethodError)

% ~/target/trunk/bin/ruby -ve’p Math.lgamma(1)’  
ruby 1.9.0 (2008-10-19 revision 17576) [x86\_64-linux]  
[0.0, 1]

---

<div class="post-metadata">

**Author:** ![Shyouhei\_U](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/94ad74/32.png) [@Shyouhei\_U](https://www.ruby-forum.com/u/Shyouhei_U)\
**Post date:** [October 19, 2008, 12:47am UTC](https://www.ruby-forum.com/t/bug-659-math-lgamma-not-defined-in-rcomplex/151251/2 "2008-10-19T00:47:58Z")

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e$B%A%1%C%He(B #659 e$B$,99?7$5$l$^$7$?!#e(B (by Anonymous)

e$B%9%F!\<%?%9e(B Opene$B$+$ie(BClosede$B$KJQ99e(B  
e$B?JD=e(B % 0e$B$+$ie(B100e$B$KJQ99e(B

## Applied in changeset r19845.

[http://redmine.ruby-lang.org/issues/show/659](http://redmine.ruby-lang.org/issues/show/659)