Eigen Analysis

   eigen numEigenvalues?

To perform a generalized eigenvalue problem to determine the first numEigenvalues eigenvalues and eigenvectors. The eigenvectors are stored at the nodes and can be printed out. Currently each invocation of this command constructs a new EigenvalueAnalysis object, each with new component objects: a ConstraintHandler of type Plain, an EigenvalueSOE and solver of type BandArpackSOE and BandArpackSolver and an algorithm of type FrequencyAlgo. These objects are destroyed when the command has finished. This will change.