MathieuCharacteristicB

MathieuCharacteristicB[r,q]

gives the characteristic value for odd Mathieu functions with characteristic exponent r and parameter q.

Details

Examples

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Basic Examples  (3)

Evaluate numerically:

Plot over a subset of the reals:

Plot over a subset of the complexes:

Scope  (19)

Numerical Evaluation  (6)

Evaluate numerically:

Evaluate to high precision:

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

Complex number inputs:

Evaluate efficiently at high precision:

Compute average-case statistical intervals using Around:

Compute the elementwise values of an array:

Or compute the matrix MathieuCharacteristicB function using MatrixFunction:

Specific Values  (2)

Simple exact values are generated automatically:

Find the positive maximum of MathieuCharacteristicB[3,q]:

Visualization  (3)

Plot the MathieuCharacteristicB function for integer parameters:

Plot the MathieuCharacteristicB function for noninteger parameters:

Plot the real part of MathieuCharacteristicB:

Plot the imaginary part of MathieuCharacteristicB:

Function Properties  (6)

The real domain of MathieuCharacteristicB:

TemplateBox[{r, x}, MathieuCharacteristicB] is a continuous function of :

TemplateBox[{1, x}, MathieuCharacteristicB] is neither non-increasing nor non-decreasing:

TemplateBox[{1, x}, MathieuCharacteristicB] is not injective:

MathieuCharacteristicB threads elementwise over lists:

TraditionalForm formatting:

Series Expansions  (2)

Find the Taylor expansion using Series:

Plots of the first three approximations around :

Find the series expansion at infinity:

Applications  (4)

Symmetric periodic solutions of the Mathieu differential equation:

This shows the stability diagram for the Mathieu equation:

As a function of the first argument, MathieuCharacteristicB is a piecewise continuous function (called bands and band gaps in solid-state physics):

Solve the Laplace equation in an ellipse using separation of variables:

This finds a zero:

This plots an eigenfunction. It vanishes at the ellipse boundary:

Possible Issues  (1)

There is no zero-order MathieuCharacteristicB:

Neat Examples  (1)

Branch points of the Mathieu characteristic along the imaginary q axis:

Wolfram Research (1996), MathieuCharacteristicB, Wolfram Language function, https://reference.wolfram.com/language/ref/MathieuCharacteristicB.html.

Text

Wolfram Research (1996), MathieuCharacteristicB, Wolfram Language function, https://reference.wolfram.com/language/ref/MathieuCharacteristicB.html.

CMS

Wolfram Language. 1996. "MathieuCharacteristicB." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/MathieuCharacteristicB.html.

APA

Wolfram Language. (1996). MathieuCharacteristicB. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/MathieuCharacteristicB.html

BibTeX

@misc{reference.wolfram_2025_mathieucharacteristicb, author="Wolfram Research", title="{MathieuCharacteristicB}", year="1996", howpublished="\url{https://reference.wolfram.com/language/ref/MathieuCharacteristicB.html}", note=[Accessed: 20-June-2025 ]}

BibLaTeX

@online{reference.wolfram_2025_mathieucharacteristicb, organization={Wolfram Research}, title={MathieuCharacteristicB}, year={1996}, url={https://reference.wolfram.com/language/ref/MathieuCharacteristicB.html}, note=[Accessed: 20-June-2025 ]}