Op_t OpToCStr OpToStr Side_t Spin_t

enum Op_t Identifies the three possible spin operators and also represents the shift associated to its action on the quantum number blocks. Enumerator OpSm  \( S^- \) operator OpSz  \( S^z \) operator OpSp  \( S^+ \) operator OpEye  Identity operator. Definition at line 21 of file DMRGBlock.hpp.