Flexible subspace iteration with moments for an effective contour integration?based eigensolver

Contour integration schemes are a valuable tool for the solution of difficult interior eigenvalue problems. However, many large linear systems with multiple right hand sides may prove prohibitive computational expense. The number sides, and thus, cost be reduced if projected subspace is created using moments. In this work, we explore heuristics choice application moments respect to various other important parameters in contour scheme. We provide evidence expected performance, accuracy, robustness schemes, showing that good heuristic choices can scheme featuring properties all three these measures.