preserves
71Eureka, California — For detail on historic use of the Greek exclamation Eureka! , see Eureka (word). City of Eureka   City   …
72Elgin, Illinois — For other uses, see Elgin (disambiguation). Elgin, Illinois Counties: Kane, Cook Township: Elgin Incorporated: City, 1854 Mayor: Dave Kaptain ZIP code(s) …
73Mettawa, Illinois — Coordinates: 42°14′38″N 87°55′4″W / 42.24389°N 87.91778°W / 42.24389; 87.91778 …
74National Park Service — Arrowhead Agency overview Formed August 25, 1916 Jurisdiction …
75Topos — For topoi in literary theory, see Literary topos. For topoi in rhetorical invention, see Inventio. In mathematics, a topos (plural topoi or toposes ) is a type of category that behaves like the category of sheaves of sets on a topological space.… …
76Stone duality — In mathematics, there is an ample supply of categorical dualities between certain categories of topological spaces and categories of partially ordered sets. Today, these dualities are usually collected under the label Stone duality, since they… …
77Pecatonica River — The Pecatonica River is a tributary of the Rock River, 120 mi (193 km) long, in southern Wisconsin and northern Illinois in the United States.The word Pecatonica means crooked river. It rises in the hills of southwest Wisconsin, in southwest Iowa …
78Complete Heyting algebra — In mathematics, especially in order theory, a complete Heyting algebra is a Heyting algebra which is complete as a lattice. Complete Heyting algebras are the objects of three different categories; the category CHey, the category Loc of locales,… …
79Laplace–Runge–Lenz vector — Throughout this article, vectors and their magnitudes are indicated by boldface and italic type, respectively; for example, left| mathbf{A} ight| = A. In classical mechanics, the Laplace–Runge–Lenz vector (or simply the LRL vector) is a vector… …
80Neck dissection — Intervention ICD 9 CM 40.4 MeSH …
