Incomplete Gamma Function a x actual gser(a,x) gammln(a) gln 0.10 0.031623 0.742026 0.742026 2.252713 2.252713 0.10 0.316228 0.911975 0.911975 2.252713 2.252713 0.10 1.581139 0.989896 0.989896 2.252713 2.252713 0.50 0.070711 0.293128 0.293128 0.572365 0.572365 0.50 0.707107 0.765642 0.765642 0.572365 0.572365 0.50 3.535534 0.992166 0.992166 0.572365 0.572365 1.00 0.100000 0.095163 0.095163 0.000000 0.000000 1.00 1.000000 0.632121 0.632120 0.000000 0.000000 1.00 5.000000 0.993262 0.993262 0.000000 0.000000 1.10 0.104881 0.075747 0.075747 -0.049872 -0.049872 1.10 1.048809 0.607646 0.607646 -0.049872 -0.049872 1.10 5.244044 0.993343 0.993343 -0.049872 -0.049872 2.00 0.141421 0.009105 0.009105 0.000000 0.000000 2.00 1.414214 0.413064 0.413064 0.000000 0.000000 2.00 7.071068 0.993145 0.993145 0.000000 0.000000 6.00 2.449490 0.038732 0.038732 4.787492 4.787492 6.00 12.247449 0.982594 0.982594 4.787492 4.787492 11.00 16.583124 0.940427 0.940427 15.104413 15.104413 26.00 25.495098 0.486387 0.486387 58.003605 58.003605 41.00 44.821869 0.735971 0.735970 110.320641 110.320641