bundles / scipy latest / scipy / linalg / _flapack / sstein

lapack_function

`scipy.linalg._flapack:sstein`

source: build-install/usr/lib/python3.14/site-packages/scipy/linalg/_flapack.cpython-314-x86_64-linux-gnu.so

Signature

def sstein(d, e, w, iblock, isplit)

Summary

Compute eigenvectors of a symmetric tridiagonal matrix by inverse iteration, for eigenvalues supplied by stebz (LAPACK sstein).

Parameters

d : ndarray: Diagonal elements of the symmetric tridiagonal matrix, length n.
e : ndarray: Off-diagonal elements, length n - 1.
w : ndarray: The m eigenvalues to compute vectors for, as returned by stebz.
iblock : ndarray: Block indices from stebz.
isplit : ndarray: Splitting points from stebz.

Returns

z : ndarray: Orthonormal eigenvectors as columns, shape (n, m).
info : int: 0 on success; if negative, the -info-th argument had an illegal value; if positive, that many eigenvectors failed to converge.

Aliases

scipy.linalg._flapack.sstein