# JacobiDS

JacobiDS[u,m]

gives the Jacobi elliptic function .

# Details

• Mathematical function, suitable for both symbolic and numerical manipulation.
• , where .
• is a doubly periodic function in with periods and , where is the elliptic integral EllipticK.
• JacobiDS is a meromorphic function in both arguments.
• For certain special arguments, JacobiDS automatically evaluates to exact values.
• JacobiDS can be evaluated to arbitrary numerical precision.
• JacobiDS automatically threads over lists.

# Examples

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## Basic Examples(4)

Evaluate numerically:

Plot the function over a subset of the reals:

Plot over a subset of the complexes:

Series expansions at the origin:

## Scope(33)

### Numerical Evaluation(4)

Evaluate numerically to high precision:

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

Evaluate for complex arguments:

Evaluate JacobiDS efficiently at high precision:

### Specific Values(3)

Simple exact values are generated automatically:

Some poles of JacobiDS:

Find a local minimum of JacobiDS as a root of :

### Visualization(3)

Plot the JacobiDS functions for various parameter values:

Plot JacobiDS as a function of its parameter :

Plot the real part of :

Plot the imaginary part of :

### Function Properties(8)

JacobiDS is -periodic along the real axis:

JacobiDS is -periodic along the imaginary axis:

JacobiDS is an odd function in its first argument:

JacobiDS is not an analytic function:

It has both singularities and discontinuities:

is neither nondecreasing nor nonincreasing:

is not injective for any fixed :

is not surjective for fixed :

It is surjective for :

JacobiDS neither non-negative nor non-positive:

JacobiDS is neither convex nor concave:

### Differentiation(3)

First derivative:

Higher derivatives:

Plot higher derivatives for :

Derivative with respect to :

### Integration(3)

Indefinite integral of JacobiDS:

Definite integral of an odd function over the interval centered at the origin is 0:

More integrals:

### Series Expansions(3)

Series expansion for :

Plot the first three approximations for around :

Taylor expansion for :

Plot the first three approximations for around :

JacobiDS can be applied to a power series:

### Function Identities and Simplifications(3)

Parity transformation and periodicity relations are automatically applied:

Identity involving JacobiCS:

Argument simplifications:

### Function Representations(3)

Representation in terms of Csc of JacobiAmplitude:

Relation to other Jacobi elliptic functions:

## Applications(5)

Conformal map from a rectangle to the unit disk:

Visualize the map:

Generator for the hierarchy of solutions of the nonlinear diffusion equation :

Numerical check of the solutions:

Conformal map from an ellipse to the unit disk:

Visualize the map:

Cartesian coordinates of a pendulum:

Plot the timedependence of the coordinates:

Plot the trajectory:

Parameterization of Costa's minimal surface [MathWorld]:

## Properties & Relations(2)

Compose with inverse functions:

Use PowerExpand to disregard multivaluedness of the inverse function:

Solve a transcendental equation:

## Possible Issues(2)

Machine-precision input is insufficient to give the correct answer:

Currently only simple simplification rules are built in for Jacobi functions:

Wolfram Research (1988), JacobiDS, Wolfram Language function, https://reference.wolfram.com/language/ref/JacobiDS.html.

#### Text

Wolfram Research (1988), JacobiDS, Wolfram Language function, https://reference.wolfram.com/language/ref/JacobiDS.html.

#### CMS

Wolfram Language. 1988. "JacobiDS." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/JacobiDS.html.

#### APA

Wolfram Language. (1988). JacobiDS. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/JacobiDS.html

#### BibTeX

@misc{reference.wolfram_2024_jacobids, author="Wolfram Research", title="{JacobiDS}", year="1988", howpublished="\url{https://reference.wolfram.com/language/ref/JacobiDS.html}", note=[Accessed: 18-June-2024 ]}

#### BibLaTeX

@online{reference.wolfram_2024_jacobids, organization={Wolfram Research}, title={JacobiDS}, year={1988}, url={https://reference.wolfram.com/language/ref/JacobiDS.html}, note=[Accessed: 18-June-2024 ]}