The Mayor of Casterbridge The Mayor of Casterbridge The Mayor of Casterbridge: The Life and Death of a Man of Character is an 1886 novel by the English author Thomas Hardy. One of Hardy's Wessex novels, it is set in a fictional rural England with Casterbridge standing in for Dorchester in Dorset where the author spent his youth. It was first published as a weekly serialisation from January 1886. The novel is considered to be one of the Hardy's masterpieces, although it has been criticised for incorporating too many incidents: a consequence of the author trying to include something in every weekly published instalment.
S (set theory) a set "x" whose members are just those sets satisfying "A"("y"). The role of "Spec" in S is analogous to that of the axiom schema of specification of Z. Boolos’s name for Zermelo set theory minus extensionality was "Z-". Boolos derived in S all axioms of "Z-" except the axiom of choice. The purpose of this exercise was to show how most of conventional set theory can be derived from the iterative conception of set, assumed embodied in S. Extensionality does not follow from the iterative conception, and so is not a theorem of S. However, S + Extensionality is