[Scipy-tickets] [SciPy] #834: exp1 strange behavior near negative integer values

SciPy scipy-tickets@scipy....
Fri Jan 2 01:22:14 CST 2009


#834: exp1 strange behavior near negative integer values
--------------------+-------------------------------------------------------
 Reporter:  cdavid  |       Owner:  somebody
     Type:  defect  |      Status:  new     
 Priority:  normal  |   Milestone:  0.7.0   
Component:  Other   |     Version:  devel   
 Severity:  normal  |    Keywords:          
--------------------+-------------------------------------------------------
 Reported by David Joyner on the ML

 {{{
 >>> import scipy.special, math
 >>> -scipy.special.exp1(-complex(19.9999990))
 (25615628.4058083-3.1415926535897931j)
 >>> -scipy.special.exp1(-complex(19.9999991))
 (25615624.582086116+3.1415926535897931j)
 }}}

-- 
Ticket URL: <http://scipy.org/scipy/scipy/ticket/834>
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