lapack_eigh_f32

void lapack_eigh_f32(const float * A, int n, float * w, float * V_out, int * info)

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Symmetric eigendecomposition (float32) via divide-and-conquer.

For a real symmetric input $A = A^T$ , computes the spectral decomposition $A = V \, \mathrm{diag}(w) \, V^T$ . Eigenvalues are produced in ascending order and eigenvectors are the columns of $V$ (returned row-major after transposition).

Math

$A V = V \, \mathrm{diag}(w)$

References

LAPACK ssyevd_.

Parameters

Aconst float*

Row-major

n \times n

symmetric matrix.

nint

Side length.

wfloat*

Eigenvalues, length

n

(ascending).

V_outfloat*

Row-major matrix whose columns are the eigenvectors.

infoint*

LAPACK status word.