Developer Reference

Intel® oneAPI Math Kernel Library LAPACK Examples

ID 766877
Date 12/20/2021

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DSYEVX Example

The routine computes all the eigenvalues and, optionally, the eigenvectors of a square real symmetric matrix A.

The eigenvector v(j) of A satisfies the following formula:

A*v(j) = lambda(j)*v(j)


lambda(j) is its eigenvalue.

The computed eigenvectors are orthonormal. The eigenvalues and eigenvectors can be selected by specifying either a range of values or a range of indices of the desired eigenvalues.

C Interface

Please refer to the Matrix Layout section of the C Interface Conventions for the description of Row Major (C default) and Column Major (Fortran default).

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