Semigroups generated by convex combinations of several Feller generators in models of mathematical biology
LetS be a locally compact Hausdor space. Let Ai; i = 0;1;:::;N, be generators of Feller semigroups in C0(S) with related Feller processes Xi =fXi(t);t 0g and let i; i = 0;:::;N, be non-negative continuous functions onS with P N i=0 i = 1: Assume that the closure A of P N k=0 kAk defined on