15.2.1  Eigenvalues

The eigenvals command finds eigenvalues of a matrix.

• eigenvals takes A, a square matrix.
• eigenvals(A) returns the sequence of the eigenvalues of A, including multiplicities. (If A is an n× n matrix, then the sequence will have n values.)

Remark.

Xcas may not be able to find the exact roots of the characteristic polynomial in some cases. In that case, eigenvals(A) will return approximate eigenvalues of A if the coefficients are numeric or a subset of the eigenvalues if the coefficients are symbolic.

Examples