Incomplete Gamma Function a x actual gammp(a,x) 0.10 0.031623 0.742026 0.742026 0.10 0.316228 0.911975 0.911975 0.10 1.581139 0.989896 0.989896 0.50 0.070711 0.293128 0.293128 0.50 0.707107 0.765642 0.765642 0.50 3.535534 0.992166 0.992166 1.00 0.100000 0.095163 0.095163 1.00 1.000000 0.632121 0.632120 1.00 5.000000 0.993262 0.993262 1.10 0.104881 0.075747 0.075747 1.10 1.048809 0.607646 0.607646 1.10 5.244044 0.993343 0.993342 2.00 0.141421 0.009105 0.009105 2.00 1.414214 0.413064 0.413064 2.00 7.071068 0.993145 0.993145 6.00 2.449490 0.038732 0.038732 6.00 12.247449 0.982594 0.982594 11.00 16.583124 0.940427 0.940427 26.00 25.495098 0.486387 0.486387 41.00 44.821869 0.735971 0.735971