mathjs/docs/reference/functions/expm.md

Function expm

Compute the matrix exponential, expm(A) = e^A. The matrix must be square. Not to be confused with exp(a), which performs element-wise exponentiation.

The exponential is calculated using the Padé approximant with scaling and squaring; see "Nineteen Dubious Ways to Compute the Exponential of a Matrix," by Moler and Van Loan.

Syntax

math.expm(x)

Parameters

Parameter	Type	Description
x	Matrix	A square Matrix

Returns

Type	Description
Matrix	The exponential of x

Examples

const A = [[0,2],[0,0]]
math.expm(A)        // returns [[1,2],[0,1]]

See also

exp