
Algorithm 858
 Referenced in 13 articles
[sw09120]
 with Jνi(x) the Bessel function of the first kind and (real) order ... integral can be approximated using the incomplete Gamma function Γ(a,z). Accurate error estimates...

Algorithm 542
 Referenced in 7 articles
[sw22830]
 Algorithm 542: Incomplete Gamma functions. Taylor’s series and continued fractions for evaluating Tricomi ... incomplete gamma function and the complementary incomplete gamma function Gams...

Algorithm 926
 Referenced in 4 articles
[sw12901]
 Algorithm 926, incomplete gamma functions with negative arguments. An algorithm for accurately computing the lower ... incomplete gamma function γ(a,t) in the case where...

IncgamNEG
 Referenced in 3 articles
[sw16456]
 Algorithm 969: Computation of the Incomplete Gamma Function for Negative Values of the Argument ... algorithm for computing the incomplete gamma function γ*(a, z) for real values...

Algorithm 955
 Referenced in 3 articles
[sw17442]
 approximations for the inverse of the incomplete gamma function are derived, which are used ... evaluations of the inverse Poisson cumulative distribution function. An asymptotic approximation based on the standard ... Temme’s approximation of the incomplete gamma function is more efficient due to conditional branching...

GRATIO
 Referenced in 3 articles
[sw24353]
 FORTRAN subroutines for computing the incomplete gamma function ratios and their inverse. The FORTRAN subroutines ... computing the incomplete gamma function ratios and their inverse. A sample program exercising GRATIO...

ncg
 Referenced in 3 articles
[sw12413]
 inverse and the noncentrality parameter. The noncentral gamma distribution can be viewed as a generalization ... Poisson density function with a incomplete gamma function. The noncentral gamma distribution is not available ... propose an algorithm for the noncentral gamma by combining the method originally proposed ... function, density function, quantiles and noncentrality parameter of the noncentral incomplete gamma and its particular...

GAMINV
 Referenced in 2 articles
[sw24354]
 FORTRAN subroutines for computing the incomplete gamma function ratios and their inverse. The FORTRAN subroutines ... computing the incomplete gamma function ratios and their inverse. A sample program exercising GRATIO...

Algorithm 1006
 Referenced in 1 article
[sw35939]
 accurate evaluation of a generalized incomplete gamma function. We present a computational procedure to evaluate ... lower (x=0) and upper (y=+∞) incomplete gamma functions. To allow for large values ... complete gamma function. The generalized incomplete gamma function is estimated with continued fractions, with integrations...

JRAF
 Referenced in 1 article
[sw38331]
 functions with noninteger exponents and incomplete gamma functions. The computer program package to calculate...

IRTDIF
 Referenced in 1 article
[sw37277]
 Computer Program for IRT Differential Item Functioning Analysis. RT models. To compute the DIF measures ... compute the percentage points of the incomplete gamma functions. Execution of the program requires...

ANSYS
 Referenced in 663 articles
[sw00044]
 ANSYS offers a comprehensive software suite that spans...

GAP
 Referenced in 2948 articles
[sw00320]
 GAP is a system for computational discrete algebra...

KNITRO
 Referenced in 180 articles
[sw00490]
 KNITRO is a solver for nonlinear optimization. It...

MACHAR
 Referenced in 22 articles
[sw00539]
 Algorithm 665: Machar: a subroutine to dynamically determined...

Maple
 Referenced in 5168 articles
[sw00545]
 The result of over 30 years of cutting...

Mathematica
 Referenced in 6041 articles
[sw00554]
 Almost any workflow involves computing results, and that...

Matlab
 Referenced in 12477 articles
[sw00558]
 MATLAB® is a highlevel language and interactive...

Maxima
 Referenced in 154 articles
[sw00560]
 Maxima is a system for the manipulation of...