InverseJacobiNS[v,m]
gives the inverse Jacobi elliptic function
.
InverseJacobiNS
InverseJacobiNS[v,m]
gives the inverse Jacobi elliptic function
.
Details
- Mathematical function, suitable for both symbolic and numerical manipulation.
gives the value of
for which
. - InverseJacobiNS has branch cut discontinuities in the complex v plane with branch points at
and infinity, and in the complex m plane with branch points at
and infinity. - The inverse Jacobi elliptic functions are related to elliptic integrals.
- For certain special arguments, InverseJacobiNS automatically evaluates to exact values.
- InverseJacobiNS can be evaluated to arbitrary numerical precision.
- InverseJacobiNS automatically threads over lists.
Examples
open all close allBasic Examples (5)
InverseJacobiNS[1.4, 0.7]JacobiNS[%, 0.7]Plot the function over a subset of the reals:
Plot[InverseJacobiNS[x, 1 / 4], {x, -5, 5}]Plot over a subset of the complexes:
ComplexPlot3D[InverseJacobiNS[z, 1 / 3], {z, -2 - 2I, 2 + 2I}, PlotLegends -> Automatic]Series expansion at the origin:
Series[InverseJacobiNS[z, m], {m, 0, 1}]Series expansion at Infinity:
Series[InverseJacobiNS[2, m], {m, ∞, 3}]//Normal//FullSimplifyScope (30)
Numerical Evaluation (5)
N[InverseJacobiNS[3, 1 / 2], 50]The precision of the input tracks the precision of the output:
InverseJacobiNS[3, 0.50000000000000000000000000000000]Evaluate for complex arguments:
InverseJacobiNS[0.2 + I, 0.1 - 0.3I]Evaluate InverseJacobiNS efficiently at high precision:
InverseJacobiNS[3, 0.5`500]//TimingInverseJacobiNS[3, 0.5`50000];//TimingCompute average-case statistical intervals using Around:
InverseJacobiNS[Around[3, 0.01], .5]Compute the elementwise values of an array:
InverseJacobiNS[{{-I, 0}, {0, I}}, 1]Or compute the matrix InverseJacobiNS function using MatrixFunction:
MatrixFunction[InverseJacobiNS[#, 1]&, {{-I, 0}, {0, I}}]//FullSimplifySpecific Values (4)
Simple exact results are generated automatically:
{InverseJacobiNS[ν, 0], InverseJacobiNS[ν, 1]}{InverseJacobiNS[-1, m], InverseJacobiNS[1, m]}InverseJacobiNS[ν, Infinity]InverseJacobiNS[Infinity, Infinity]Find a real root of the equation
:
f[x_] := InverseJacobiNS[x, 1 / 3] - 1;
xzero = Solve[f[x] == 0 && 1.0 < x < 3.0, x][[1, 1, 2]]//QuietPlot[f[ν], {ν, 0, 2}, Epilog -> Style[Point[{xzero, f[xzero]}], PointSize[Large], Red]]Parity transformation is automatically applied:
InverseJacobiNS[-ν, m]Visualization (3)
Plot InverseJacobiNS for various values of the second parameter
:
Plot[{InverseJacobiNS[ν, -2], InverseJacobiNS[ν, 0], InverseJacobiNS[ν, 2]}, {ν, -3, 3}]Plot InverseJacobiNS as a function of its parameter
:
Plot[{InverseJacobiNS[1, m], InverseJacobiNS[3 / 2, m], InverseJacobiNS[2, m]}, {m, -5, 5}]ComplexContourPlot[Re[InverseJacobiNS[z, 2]], {z, -3 - 3I, 3 + 3I}, IconizedObject[«PlotOptions»]]ComplexContourPlot[Im[InverseJacobiNS[z, 2]], {z, -3 - 3I, 3 + 3I}, IconizedObject[«PlotOptions»]]Function Properties (6)
InverseJacobiNS is not an analytic function:
FunctionAnalytic[InverseJacobiNS[x, m], {x, m}]It has both singularities and discontinuities:
FunctionSingularities[InverseJacobiNS[x, 1 / 3], x]//QuietFunctionDiscontinuities[InverseJacobiNS[x, 1 / 3], x]//Quiet
is neither nondecreasing nor nonincreasing on its real domain:
FunctionMonotonicity[{InverseJacobiNS[x, 1 / 3], x <= -1 || x >= 1}, x]FunctionInjective[InverseJacobiNS[x, 1 / 3], x]Plot[{InverseJacobiNS[x, 1 / 3], .3}, {x, -5, 5}]FunctionSurjective[InverseJacobiNS[x, 1 / 3], x]Plot[{InverseJacobiNS[x, 1 / 3], -4}, {x, -5, 5}]
is neither non-negative nor non-positive on its real domain:
FunctionSign[{InverseJacobiNS[x, 1 / 3], x <= -1 || x >= 1}, x]
is neither convex nor concave on its real domain:
FunctionConvexity[{InverseJacobiNS[x, 1 / 3], x <= -1 || x >= 1}, x]Differentiation and Integration (5)
D[InverseJacobiNS[ν, m], ν]derivs = Table[D[InverseJacobiNS[ν, m], {ν, n}], {n, 1, 3}]//SimplifyPlot[Evaluate[derivs /. m -> 1 / 3], {ν, -2, 2}, PlotLegends -> {"First Derivative", "Second Derivative", "Third Derivative"}]Differentiate InverseJacobiNS with respect to the second argument
:
D[InverseJacobiNS[ν, m], m]derivs = Table[D[InverseJacobiNS[ν, m], {m, n}], {n, 1, 3}];Plot[Evaluate[derivs /. ν -> 3 / 2], {m, 0, 2}, PlotLegends -> {"First Derivative", "Second Derivative", "Third Derivative"}, WorkingPrecision -> 25]Definite integral of an odd function over an interval centered at the origin is 0:
Integrate[InverseJacobiNS[ν, m], {ν, -ν0, ν0}, Assumptions -> ν0∈Reals]Series Expansions (3)
Series[InverseJacobiNS[ν, m], {ν, 2, 3}]Plot the first three approximations for
around
:
terms = Normal@Table[Series[InverseJacobiNS[ν, 2], {ν, 2, n}], {n, 1, 3}];
Plot[{InverseJacobiNS[ν, 2], terms}, {ν, 1, 3}]Series[InverseJacobiNS[ν, m], {m, 0, 2}]//FullSimplifyPlot the first three approximations for
around
:
terms = Normal@Table[Series[InverseJacobiNS[2, m], {m, 0, n}], {n, 1, 3}];
Plot[{InverseJacobiNS[2, m], terms}, {m, -10, 10}]InverseJacobiNS can be applied to a power series:
InverseJacobiNS[ν, Log[1 + m] + O[m] ^ 2]Function Identities and Simplifications (2)
InverseJacobiNS is the inverse function of JacobiNS:
Solve[ν == JacobiNS[u, m], u][[1, 1]]//QuietCompose with inverse function:
{InverseJacobiNS[JacobiNS[ν, m], m], JacobiNS[InverseJacobiNS[ν, m], m]}Use PowerExpand to disregard multivaluedness of the inverse function:
PowerExpand[%]Other Features (2)
InverseJacobiNS threads elementwise over lists:
InverseJacobiNS[{ν1, ν2}, m]TraditionalForm formatting:
InverseJacobiNS[ν, m]//TraditionalFormApplications (1)
Properties & Relations (1)
Obtain InverseJacobiNS from solving equations containing elliptic functions:
Solve[JacobiNS[x, m]^2 + 2JacobiNS[x, m] == a, x]See Also
Tech Notes
Related Guides
Related Links
History
Introduced in 1988 (1.0)
Text
Wolfram Research (1988), InverseJacobiNS, Wolfram Language function, https://reference.wolfram.com/language/ref/InverseJacobiNS.html.
CMS
Wolfram Language. 1988. "InverseJacobiNS." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/InverseJacobiNS.html.
APA
Wolfram Language. (1988). InverseJacobiNS. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/InverseJacobiNS.html
BibTeX
@misc{reference.wolfram_2026_inversejacobins, author="Wolfram Research", title="{InverseJacobiNS}", year="1988", howpublished="\url{https://reference.wolfram.com/language/ref/InverseJacobiNS.html}", note=[Accessed: 13-June-2026]}
BibLaTeX
@online{reference.wolfram_2026_inversejacobins, organization={Wolfram Research}, title={InverseJacobiNS}, year={1988}, url={https://reference.wolfram.com/language/ref/InverseJacobiNS.html}, note=[Accessed: 13-June-2026]}