TY - JOUR AB - We develop some tools for manipulating and constructing projections in C*-algebras. These are then applied to give short proofs of some standard projection homotopy results, as well as strengthen some fundamental classical results for C*-algebras of real rank zero, specifically on liftings, excising pure states and Kadison’s transitivity theorem. Lastly, we investigate some order properties of the set of projections in C*-algebras of real rank zero, building on the work in [5]. AU - Bice, Tristan DA - 2013 LA - eng IS - Münster Journal of Mathematics M2 - 557 PY - 2013 SP - 557-581 T2 - Münster Journal of Mathematics TI - The projection calculus UR - https://nbn-resolving.org/urn:nbn:de:hbz:6-55309456861 Y2 - 2024-11-22T10:18:22 ER -