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

Signature

built-in dsaupd_wrap ( state , resid , v , ipntr , workd , workl )

Summary

Internal wrapper for the ARPACK dsaupd routine (double precision).

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, float64: The residual vector.
v : ndarray, float64: The Lanczos basis vectors (workspace).
ipntr : ndarray, int32: Pointer array for workd and v.
workd : ndarray, float64: Distributed work array.
workl : ndarray, float64: 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.dsaupd_wrap