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Hi, I have a problem using gsl_sf_hyperg_U with certain arguments. running this example for(z=3.0;z>0.0;z-=0.1) printf("%g %g\n",z,gsl_sf_hyperg_U(-2.0,4.0,z)); i get ... 2.2 2.84 2.1 3.41 2 4 gsl: psi.c:381: ERROR: domain error Default GSL error handler invoked. Aborted AFAIK the hypergeometricU is well defined for z> 0.0. I get the same error with gsl-1.11. Any ideas? -- Stefan Gerlach
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