Multiplexor categories and models of soft linear logic

We give a categorical interpretation of Lafont's Soft Linear Logic, a logical system complete for polynomial time computation, in terms of multiplexor categories. We present two main classes of models and methods for constructing examples in each case. As a concrete example of the first type, we introduce a simple game semantics for Multiplicative Soft Linear Logic. To illustrate the second type, we give a realizability model and a new proof of the polytime soundness of Soft Linear Logic. These results further our semantic understanding of Soft Linear Logic and polynomial time.