Hello all, I am trying to find the ground state eigenvector of a system to study entanglement. I read on a previous post that you can copy and paste the program print_numeric to the sparsediag program to print the basis vector of the ground state. I am however having some problems of knowing what to copy and paste due my inexperience with C++. I would be grateful for any help or hints on how to combine the two programs. Thanks, Rex