Added prop_matrix_close(L,R)
Added LxL correlation functions.
Added expected() over vectors of operators.
truncate(MPS...) now can also increase the dimension of the MPS to adjust the desired value.
truncate(MPS...) now can also increase the dimension of the MPS to adjust the desired value.
In truncate_mps.cc, the dimensions were off by one site.
The simplification algorithm took too long to stop.
Increased tolerance to numerical errors up to 1e-13
Return to the two-site simplification routine.
Leave a debugging statement for convenience