Michael Somos on Fri, 29 Oct 1999 16:30:40 -0400 (EDT)

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incgamc() bug

                    GP/PARI CALCULATOR Version 2.0.17 (beta)
                i686 running linux (ix86 kernel) 32-bit version
              (readline v2.2 enabled, extended help not available)

                           Copyright (C) 1989-1999 by
          C. Batut, K. Belabas, D. Bernardi, H. Cohen and M. Olivier.

Type ? for help, \q to quit.
Type ?12 for how to get moral (and possibly technical) support.

   realprecision = 28 significant digits
   seriesprecision = 16 significant terms
   format = g0.28

parisize = 4000000, primelimit = 500000
gp> ??incgamc

   complementary incomplete gamma function.

   The  arguments  s  and  x must be positive.   The result returned is int_0^x
e^{-t}t^{s-1}dt, when x is not too large.

   The library syntax is incgam3(s,x,prec).

gp> incgamc(-1,1)
  ***   division by zero in R/R

Seems like a bug to me. Shalom, Michael

Michael Somos <somos@grail.cba.csuohio.edu>     Cleveland State University
http://grail.cba.csuohio.edu/~somos/            Cleveland, Ohio, USA 44115