Hello to all, I am using SLEPc library to solve an eigenvalue problem using the lapack solver.
the solver works fine (both eigenvalue and eigenvectors are correct) but the order in which solutions are given is different from the original one. My problem is: I need to retrieve the pair (eigenvalue + eigenvector) with the same order as the original problem matrix OR I need to get the problem matrix in the same order as the solution pairs. For the sake of clarity, below I report an example of what I mean: Cheers, Alessio COEFFICIENT MATRIX: 1 0 0 0 2 0 0 0 3 ##### EXPECTED SOLUTION ###### 1.000 0.000 0.000 0.000 1.000 0.000 0.000 0.000 1.000 with eigenvalues 1.000 2.000 3.000 ###### REAL SOLUTION ###### EIGENVECTOR MATRIX (row ordered) 0.000 0.000 1.000 0.000 1.000 0.000 1.000 0.000 0.000 EIGENVALUES 3.000 2.000 1.000 -- -------------------------------------------------------------------------------------------------------------------- Alessio Cardillo - PhD student in Physics Department of Condensed Matter Physics, University of Zaragoza and Institute for Biocomputation and Physics of Complex Systems (BIFI) University of Zaragoza Facultad de Ciencias, Universidad de Zaragoza, C/Pedro Cerbuna 12, 50009, Zaragoza, Spain Phone: +34 976 76 2455 Web : http://bifi.es/~cardillo/ Web 2: http://www.ct.infn.it/atp/ ---------------------------------------------------------------------------------------------------------------------
