Two on a Tower have done...while other eminent critics (I wonder if they are the same) print the most cutting rebukes you can conceive—show me (to my amazement) that I am quite an immoral person...” Two on a Tower Two on a Tower (1882) is a novel by English author Thomas Hardy, classified by him as a romance and fantasy and now regarded as one of his minor works. The book is one of Hardy's Wessex novels, set in a parallel version of late Victorian Dorset. Hardy placed an epigraph at the beginning of this book. The epigraph is from a Richard Crashaw poem,
S (set theory) ω + "n" for finite "n", but not of stage ω + ω. Nevertheless, S yields enough of Cantor's paradise to ground almost all of contemporary mathematics. Boolos compares S at some length to a variant of the system of Frege’s "Grundgesetze", in which Hume's principle, taken as an axiom, replaces Frege’s Basic Law V, an unrestricted comprehension axiom which made Frege's system inconsistent; see Russell's paradox. S (set theory) S is an axiomatic set theory set out by George Boolos in his 1989 article, "Iteration Again". S, a first-order theory, is two-sorted because its ontology includes “stages” as well