Left-definite regular self-adjoint Sturm-Liouville problems with separated and coupled boundary conditions are studied. A characterization is given in terms of right-definite problems, a concrete and “natural” indexing scheme for the eigenvalues is proposed. Pruefer transformation techniques can be used to establish the existence of and to give a characterization for the eigenvalues in the case...

Kaplan (1989) showed us that demonstratives are special for two reasons. First, they are connected to the context: the “canonical” uses of demonstratives (to adopt Roberts’s (2002) terminology) are associated with demonstrations, extralinguistic acts that determine the reference. Second, they’re a particularly clear case of constituents with what Kaplan calls “prepropositional” content – that i...