In mathematics, a confluent hypergeometric function is a solution of a confluent hypergeometric equation, which is a degenerate form of a hypergeometric differential equation where two of the three regular singularities merge into an irregular singularity. The term confluent refers to the merging of singular points of families of differential equations; confluere is Latin for "to flow together". There are several common standard forms of confluent hypergeometric functions:
Kummer's (confluent hypergeometric) functionM(a, b, z), introduced by Kummer (1837), is a solution to Kummer's differential equation. This is also known as the confluent hypergeometric function of the first kind. There is a different and unrelated Kummer's function bearing the same name.
Tricomi's (confluent hypergeometric) functionU(a, b, z) introduced by Francesco Tricomi (1947), sometimes denoted by Ψ(a; b; z), is another solution to Kummer's equation. This is also known as the confluent hypergeometric function of the second kind.
Whittaker functions (for Edmund Taylor Whittaker) are solutions to Whittaker's equation.
Coulomb wave functions are solutions to the Coulomb wave equation.
The Kummer functions, Whittaker functions, and Coulomb wave functions are essentially the same, and differ from each other only by elementary functions and change of variables.
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{z^{s+k}}{s+k}}={\frac {z^{s}}{s}}M(s,s+1,-z),} where M is Kummer's confluenthypergeometricfunction. When the real part of z is positive, γ ( s , z ) = s − 1...
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; z ) {\displaystyle \;_{1}F_{1}(a;b;z)=M(a;b;z)} is the confluenthypergeometricfunction. Other pairs of independent solutions may be formed from linear...
function Riesz functionHypergeometricfunctions: Versatile family of power series. Confluenthypergeometricfunction Associated Legendre functions Meijer G-function...
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{i^{l}}{(m+nl+1)}}{\frac {x^{m+nl+1}}{l!}}} is a confluenthypergeometricfunction and also an incomplete gamma function ∫ x m e i x n d x = x m + 1 m + 1 1 F 1...
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stationary one-dimensional Schrödinger equation in terms of the confluenthypergeometricfunctions. The potential is given as V = V 0 1 + W ( e − x σ ) . {\displaystyle...
{1}{(1-t)^{\alpha +1}}}e^{-tx/(1-t)}.} Laguerre functions are defined by confluenthypergeometricfunctions and Kummer's transformation as L n ( α ) ( x...
, z ) {\displaystyle M(a,b,z)} is Kummer's confluenthypergeometricfunction. The characteristic function is given by: φ ( t ; k ) = M ( k 2 , 1 2 , −...
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confluent hypergeometric series 1F1 of one variable and the confluenthypergeometric limit function 0F1 of one variable. The first of these double series was...
deviation of 1. R has a known density that can be expressed as a confluenthypergeometricfunction. The distribution of the reciprocal of a t distributed random...
the 24 symmetries of the hypergeometric differential equations obtained by Kummer. The symmetries fixing the local Heun function form a group of order 24...