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) 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 as sets. Boolos designed S to embody his understanding of the “iterative conception of set“ and the associated iterative hierarchy. S has the important property that all axioms of Zermelo set theory "Z", except the axiom of extensionality and the axiom of choice, are theorems of S or a slight modification thereof. Any grouping together of mathematical, abstract, or concrete objects, however formed, is a "collection", a