North Wessex Downs of the AONB can be found Watership Down where the book "Watership Down" by Richard Adams is set, to the north of the small market town of Whitchurch, Hampshire. Significant parts of "Jude the Obscure" by Thomas Hardy are set on and in the villages connected to the Berkshire Downs. The Area of Outstanding Natural Beauty was designated in 1972. It is currently managed by a Council of Partners whose members are: North Wessex Downs The North Wessex Downs Area of Outstanding Natural Beauty (AONB) (also known as the Chalkenwolds) is located in the English counties of West Berkshire, Hampshire,
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