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FoxH[{{{a1,α1},,{an,αn}},{{an+1,αn+1},,{ap,αp}}},{{{b1,β1},,{bm,βm}},{{bm+1,βm+1},,{bq,βq}}},z]

is the Fox H-function .

Details

  • Mathematical function, suitable for both symbolic and numerical manipulation.
  • FoxH generalizes the MeijerG function and is defined by the MellinBarnes integral where and are positive real numbers and the integration is along a path separating the poles of from the poles of .
  • Three choices are possible for the path :
    a. is a loop beginning at and ending at and encircling all the poles of once in the positive direction.
    b. is a loop beginning at and ending at and encircling all the poles of once in the negative direction.
    c. is a contour starting at the point and going to such that all the poles of are separated from the poles of .
  • FoxH specializes to MeijerG if for and : .
  • In many special cases, FoxH is automatically converted to other functions.
  • FoxH can be evaluated for arbitrary complex parameters.
  • FoxH can be evaluated to arbitrary numerical precision.
  • FoxH automatically threads over lists. »

Examples

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Basic Examples  (6)Summary of the most common use cases

Evaluate numerically:

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Many special functions are special cases of FoxH:

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Some cases cannot be easily expressed in terms of MeijerG:

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Plot the FoxH function:

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Plot over a subset of the complexes:

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Series expansion at the origin:

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Leading asymptotic term at Infinity:

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Scope  (28)Survey of the scope of standard use cases

Numerical Evaluation  (7)

Evaluate to high precision:

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The precision of the output tracks the precision of the input:

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FoxH takes complex number parameters and :

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FoxH takes complex number arguments:

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Evaluate FoxH efficiently at high precision:

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Compute the elementwise values of an array using automatic threading:

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Or compute the matrix FoxH function using MatrixFunction:

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Compute average-case statistical intervals using Around:

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Specific Values  (3)

Values at fixed points:

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Evaluate FoxH symbolically:

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Values at zero:

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Visualization  (4)

Plot a family of FoxH functions:

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ComplexContourPlot of FoxH[{{{},{}},{{{-1,1/2}},{}}, z]:

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Use AbsArgPlot and ReImPlot to plot complex values of FoxH over the real numbers:

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Plot FoxH as a function of parameters and :

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Function Properties  (5)

For simple parameters, FoxH evaluates to simpler functions:

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FoxH is symmetric in the pairs and :

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FoxH might reduce to a simpler FoxH if some of the pairs are equal:

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A more complex case:

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FoxH threads elementwise over lists in the last argument:

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TraditionalForm formatting:

Differentiation  (2)

First derivative with respect to z:

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Higher-order derivative with respect to z:

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Formula for the ^(th) derivative of a specific FoxH with respect to z:

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Integration  (3)

Compute the indefinite integral using Integrate:

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Verify it by calculating the antiderivative:

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Definite integral:

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Some other integrals:

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Series Expansions  (4)

Get the series expansion of some FoxH function at the origin:

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The first three approximations of this FoxH function around :

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Plot these approximations:

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Find the series expansion of a general FoxH function at the origin:

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Find the series expansion of a general FoxH function at Infinity:

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Get the general term in the series expansion using SeriesCoefficient:

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Applications  (3)Sample problems that can be solved with this function

Use FoxHReduce to get the representation of almost any mathematical function in terms of FoxH:

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More exotic combinations:

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A root of the trinomial equation can be written in terms of FoxH:

Verify this for :

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The roots of the general trinomial can also be expressed in terms of FoxH:

Verify these roots for and :

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Express the PDF of StableDistribution in terms of FoxH for the case of :

Evaluate it and compare with the built-in PDF generated using StableDistribution:

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Properties & Relations  (2)Properties of the function, and connections to other functions

Use FunctionExpand to expand FoxH into simpler functions:

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FoxHReduce returns FoxH representations of functions:

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Possible Issues  (3)Common pitfalls and unexpected behavior

is a singular point of FoxH:

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Series at the origin is available when the parameters are positive and are positive and exact:

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Series at Infinity is available when the parameters are positive and are positive and exact:

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Neat Examples  (1)Surprising or curious use cases

Many elementary and special functions are special cases of FoxH:

Wolfram Research (2021), FoxH, Wolfram Language function, https://reference.wolfram.com/language/ref/FoxH.html (updated 2021).
Wolfram Research (2021), FoxH, Wolfram Language function, https://reference.wolfram.com/language/ref/FoxH.html (updated 2021).

Text

Wolfram Research (2021), FoxH, Wolfram Language function, https://reference.wolfram.com/language/ref/FoxH.html (updated 2021).

Wolfram Research (2021), FoxH, Wolfram Language function, https://reference.wolfram.com/language/ref/FoxH.html (updated 2021).

CMS

Wolfram Language. 2021. "FoxH." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2021. https://reference.wolfram.com/language/ref/FoxH.html.

Wolfram Language. 2021. "FoxH." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2021. https://reference.wolfram.com/language/ref/FoxH.html.

APA

Wolfram Language. (2021). FoxH. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/FoxH.html

Wolfram Language. (2021). FoxH. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/FoxH.html

BibTeX

@misc{reference.wolfram_2025_foxh, author="Wolfram Research", title="{FoxH}", year="2021", howpublished="\url{https://reference.wolfram.com/language/ref/FoxH.html}", note=[Accessed: 31-May-2025 ]}

@misc{reference.wolfram_2025_foxh, author="Wolfram Research", title="{FoxH}", year="2021", howpublished="\url{https://reference.wolfram.com/language/ref/FoxH.html}", note=[Accessed: 31-May-2025 ]}

BibLaTeX

@online{reference.wolfram_2025_foxh, organization={Wolfram Research}, title={FoxH}, year={2021}, url={https://reference.wolfram.com/language/ref/FoxH.html}, note=[Accessed: 31-May-2025 ]}

@online{reference.wolfram_2025_foxh, organization={Wolfram Research}, title={FoxH}, year={2021}, url={https://reference.wolfram.com/language/ref/FoxH.html}, note=[Accessed: 31-May-2025 ]}