# 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 ```js math.expm(x) ``` ### Parameters Parameter | Type | Description --------- | ---- | ----------- `x` | Matrix | A square Matrix ### Returns Type | Description ---- | ----------- Matrix | The exponential of x ### Throws Type | Description ---- | ----------- ## Examples ```js const A = [[0,2],[0,0]] math.expm(A) // returns [[1,2],[0,1]] ``` ## See also [exp](exp.md)