`scipy.sparse.linalg._eigen.arpack._arpacklib:ssaupd_wrap`

Signature

built-inssaupd_wrap(state, resid, v, ipntr, workd, workl)

Summary

Internal wrapper for the ARPACK ssaupd routine.

Extended Summary

This function performs the reverse communication steps for the Implicitly Restarted Lanczos Method to find eigenvalues and eigenvectors of a symmetric matrix.

Parameters

state : dict: A dictionary holding the state of the ARPACK solver. It is used for both input and output, and is modified in-place.
resid : ndarray, float32: The residual vector.
v : ndarray, float32: The Lanczos basis vectors (workspace).
ipntr : ndarray, int32: Pointer array for workd and v.
workd : ndarray, float32: Distributed work array.
workl : ndarray, float32: Private work array.

Returns

: None: The state dictionary is updated in-place to communicate results and the next required action back to the caller.

Aliases

scipy.sparse.linalg._eigen.arpack._arpacklib.ssaupd_wrap