Triangular Witt groups - Part II: From usual to derived

We establish that the derived Witt group is isomorphic to the usual Witt gr oup when 2 is invertible. This key result opens the Ali Baba's cave of tria ngular Witt groups, linking the abstract results of Part I to classical que stions for the usual Witt group. For commercial purposes, we survey the fut ure applications of triangular Witt groups in the introduction. We also est ablish a connection between odd-indexed Witt groups and formulations. Final ly, we prove that over a commutative local ring in which 2 is a unit, the s hifted derived Witt groups are all zero but the usual one.