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1Lewy's example — In mathematics, in the field partial differential equations, Lewy s example is a celebrated example, due to Hans Lewy, of a linear partial differential equation with no solutions. It removes the hope that the analog of the Cauchy Kovalevskaya… …
2Proof by example — (also known as inappropriate generalisation ) is a logical fallacy whereby one or more examples are claimed as proof for a more general statement.This fallacy has the following argument form::I know that x in X has the property P.:Therefore, all… …
3Bing's example — In topology, Bing s theorem asserts that there exists a topological space F which is not a manifold, but such that the Cartesian product F times;R with the real line is homeomorphic to R4. In particular, this shows that the Cartesian product of a …
4First-order logic — is a formal logical system used in mathematics, philosophy, linguistics, and computer science. It goes by many names, including: first order predicate calculus, the lower predicate calculus, quantification theory, and predicate logic (a less… …
5Skolem normal form — A formula of first order logic is in Skolem normal form (named after Thoralf Skolem) if it is in conjunctive prenex normal form with only universal first order quantifiers. Every first order formula can be converted into Skolem normal form while… …
6History of wood carving — From the remotest ages the decoration of wood has been a foremost art. The tendency of human nature has always been to ornament every article in use. The North American Indian carves his wooden fish hook or his pipe stem just as the Polynesian… …
7Pandeism — This article is about a synthesis of deism and pantheism. For other uses, see Pandeism (disambiguation). Part of a series on God …
8constructive — A constructive proof is one that enables one to give an example, or give a rule for finding an example, of a mathematical object with some property. A nonconstructive proof might result in us knowing that an example exists, but having no idea how …
9Club — This article is about the type of organization of formal or informal membership. For other uses, see Club (disambiguation). A club is an association of two or more people united by a common interest or goal. A service club, for example, exists… …
10Concurrency (road) — Signs indicating a concurrency of Interstate 93, U.S. Route 1, and Massachusetts Route 3 in Boston A concurrency, overlap, or coincidence in a road network is an instance of one physical road bearing two or more different highway, motorway, or… …
