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Beta
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More About »
Beta
Beta
gives the Euler beta function
.
Beta
gives the incomplete beta function
.
MORE INFORMATION
Mathematical function, suitable for both symbolic and numerical manipulation.
.
.
Beta
has a branch cut discontinuity in the complex
plane running from
to
.
Beta
gives the generalized incomplete beta function
.
Note that the arguments in the incomplete form of
Beta
are arranged differently from those in the incomplete form of
Gamma
.
For certain special arguments,
Beta
automatically evaluates to exact values.
Beta
can be evaluated to arbitrary numerical precision.
Beta
automatically threads over lists.
In
TraditionalForm
,
Beta
is output using
\[CapitalBeta]
.
EXAMPLES
CLOSE ALL
Basic Examples
(2)
Exact values:
Evaluate numerically:
Exact values:
In[1]:=
Out[1]=
In[2]:=
Out[2]=
Evaluate numerically:
In[1]:=
Out[1]=
Scope
(6)
Evaluate for complex arguments:
Evaluate for large arguments:
Evaluate to high precision:
The precision of the output tracks the precision of the input:
Series expansion:
TraditionalForm
formatting:
Generalizations & Extensions
(10)
Evaluate symbolically in special cases:
Infinite arguments give symbolic results:
Beta
threads element-wise over lists:
Beta
can be applied to power series:
Series expansion at poles:
Series expansion at infinity:
Evaluate symbolically at integer and half-integer orders:
Series expansion at any point:
Applications
(4)
Plot the beta function for real positive values:
Plot of the absolute value of
Beta
in the complex plane:
Distribution of the average distance
of all pairs of points in a
-dimensional hypersphere:
Low-dimensional distributions can be expressed in elementary functions:
Plot distributions:
The PDF for the beta distribution for random variable
:
Plot the PDF for various parameters:
Calculate the mean:
Properties & Relations
(7)
Express the Euler beta function as a ratio of Euler gamma functions:
Reduce the generalized incomplete beta function to incomplete beta functions:
Use
FullSimplify
to simplify beta functions:
Numerically find a root of a transcendental equation:
Sum expressions involving
Beta
:
Generating function:
Generate from integrals:
Obtain as special cases of hypergeometric functions:
Possible Issues
(4)
Large arguments can give results too small to be computed explicitly:
Machine-number inputs can give high-precision results:
Algorithmically generated results often use gamma and hypergeometric rather than beta functions:
The differential equation is satisfied by a sum of incomplete beta functions:
Beta functions are typically not generated by
FullSimplify
:
Neat Examples
(2)
Nest
Beta
over the complex plane:
The determinant of the
×
matrix of reciprocals of beta functions is
:
SEE ALSO
BetaRegularized
InverseBetaRegularized
Gamma
Pochhammer
Multinomial
TUTORIALS
Special Functions
MORE ABOUT
Functions Used in Statistics
Gamma Functions and Related Functions
Special Functions
RELATED LINKS
MathWorld
The Wolfram Functions Site
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