Erfi
Erfi[z]
gives the imaginary error function .
Details
- Mathematical function, suitable for both symbolic and numerical manipulation.
- For certain special arguments, Erfi automatically evaluates to exact values.
- Erfi can be evaluated to arbitrary numerical precision.
- Erfi automatically threads over lists.
- Erfi can be used with Interval and CenteredInterval objects. »
Examples
open allclose allBasic Examples (5)
Plot over a subset of the reals:
Plot over a subset of the complexes:
Series expansion about the origin:
Series expansion at Infinity:
Scope (39)
Numerical Evaluation (6)
The precision of the output tracks the precision of the input:
Evaluate for complex arguments:
Evaluate Erfi efficiently at high precision:
Compute worst-case guaranteed intervals using Interval and CenteredInterval objects:
Or compute average-case statistical intervals using Around:
Compute the elementwise values of an array:
Or compute the matrix Erfi function using MatrixFunction:
Specific Values (3)
Visualization (2)
Function Properties (10)
Erfi is defined for all real and complex values:
Erfi takes all real values:
Erfi is an odd function:
Erfi has the mirror property :
Erfi is an analytic function of x:
It has no singularities or discontinuities:
Erfi is nondecreasing:
Erfi is injective:
Erfi is surjective:
Erfi is neither non-negative nor non-positive:
Erfi is neither convex nor concave:
Integration (3)
Indefinite integral of Erfi:
Definite integral of an odd integrand over an interval centered at the origin is 0:
Series Expansions (4)
Function Identities and Simplifications (3)
Function Representations (5)
Series representation of Erfi:
Erfi can be represented as a DifferentialRoot:
Erfi can be represented in terms of MeijerG:
TraditionalForm formatting:
Applications (4)
Solve a differential equation:
An isothermal solution of the force‐free Vlasov equation:
Integrating over the particle velocities gives the marginal distribution for the particle density:
A solution of the time‐dependent Schrödinger equation for the sudden opening of a shutter:
This plots the time‐dependent solution:
Integrate along a line from the origin with direction , expressing with Erfi :
Properties & Relations (1)
Possible Issues (1)
Text
Wolfram Research (1996), Erfi, Wolfram Language function, https://reference.wolfram.com/language/ref/Erfi.html (updated 2022).
CMS
Wolfram Language. 1996. "Erfi." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2022. https://reference.wolfram.com/language/ref/Erfi.html.
APA
Wolfram Language. (1996). Erfi. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/Erfi.html