Eigen value solvers

The eigensolverparams field has the following general syntax:

	[stype$^M$ #(in)]
	[smtype #(in)]
	solverParams$^M$ #(string)

where parameter stype allows to select solver type. Parameter smtype allows to select sparse matrix storage scheme. The scheme should be compatible with solver type. Currently supported values of stype are summarized in table 5.4.

Table 5.4: Eigen Solver parameters.

Solver type	stype id	solver parameters
Subspace Iteration	0 (default)
Inverse Iteration	1
SLEPc solver	2	requires ``smtype 7''
		see also SLEPc manual