setEigSolver¶

GraphISO.setEigSolver(**kwargs)¶

Set some or all of the eigenvalue solver properties.

Keyword Arguments:

esolver (str) – the eigensolver algorithm to use. 'krylovschur' (default) - Krylov-Schur 'arnoldi' - Arnoldi Method 'lanczos' - Lanczos Method 'power' - Power Iteration/Rayleigh Quotient Iteration 'gd' - Generalized Davidson 'jd' - Jacobi-Davidson, 'lapack' - Uses LAPACK eigenvalue solver routines 'arpack' - only available if SLEPc is compiled with ARPACK linking workType (str) – can be used to set the eigensolver worktype (either 'ncv' or 'mpd'). The default is to let SLEPc decide. workSize (int) – sets the work size if workType is set. tolIn (float) – tolerance of the eigenvalue solver (default 0. (SLEPc decides)). maxIt (int) – maximum number of iterations of the eigenvalue solver (default 0 (SLEPc decides)). verbose (bool) – if True, writes eigensolver information to the console emax_estimate (float) – used to override the calculation of the graphs maximum eigenvalue.

Caution

• If supplied, the value of emax_estimate\(\hat{\lambda}_{\max}\) must satisfy \(\hat{\lambda}_{\max}\geq\lambda_{\max}\), where \(\lambda_{\max}\) is the actual maximum eigenvalue of the graph.
• The greater the value of \(\hat{\lambda}_{\max} -\lambda_{\max}\), the longer the convergence time of the chebyshev propagator.

Note

• These properties only apply if propagator='chebyshev'
• For more information regarding these properties,refer to the SLEPc documentation