John Cowper Powys Thomas Hardy, and these novels are set in Somerset and Dorset, part of Hardy's mythical Wessex. American scholar Richard Maxwell describes these four novels "as remarkably successful with the reading public of his time". "Maiden Castle", the last of the Wessex novels, is set in Dorchester, Thomas Hardy's Casterbridge, and which he intended to be a "rival" to Hardy's "Mayor of Casterbridge". All the same, despite his indebtedness to the Victorian novel and his enthusiasm for Hardy and Walter Scott, as well as for lesser figures such as Ainsworth, Powys was clearly a modernist, and has affinities also with Fyodor
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