Closed graph theorem
Closed graph theorem In mathematics, the closed graph theorem is a basic result in ...
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Theorem of the closed graph   (translated from Spanish)
Theorem of the closed graph If X e And they are espacios ... X → And linear whose grafo is closed in the topológico space a product X×Y is continuous. This theorem is demonstrated using teorema of the ...
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Planar graph
Planar graph In graph theory, a planar graph is a graph that can be embedded in the plane ... following two graphs are planar: The second graph (the complete graph K 4 ) is ...
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Graph theory   (translated from Japanese)
Graph theory Graph theoryMathematicsOne field.Node（Nodal point・Apex) GatheringEdge（Branch・Side) It consists ... and the like widely. Table of contents Graph For example the case where of the ... is, searching the various characters which the graph hasGraph theorySo it is. Six nodes and one example in the graph which consists of seven edges "Not ...
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Logical graph
Logical graph A logical graph is a special type of graph-theoretic structure in any one of several ... versions of a graphical formalism, or a graph-theoretic formal language, designed to be interpreted ... is abstractly the same formal base of graph-theoretic structures. This article examines the ...
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Robertson–Seymour theorem
Robertson–Seymour theorem In graph theory, the Robertson–Seymour theorem states that every downwardly closed set of (isomorphism classes of) finite graphs ... many" were deleted from the statement the theorem would become fairly trivial. To understand ...
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Four color theorem
Four color theorem Example of a four color map Example ... with non-contiguous regions The four color theorem states that given any plane separated into ... to color a map. The four color theorem was the first major theorem to be proved using a computer, and ... several early failed attempts at proving the theorem. One proof of the theorem was ...
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Glossary of graph theory
Glossary of graph theory Graph theory is a growth area in mathematical ... keep up with current usage. Basics A graph G consists of two types of elements ... leading to the notion of a directed graph or a digraph, see Section Direction. Alternative models of graph exist; e.g., a graph may ...
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Schnyder's theorem
Schnyder's theorem In mathematics, Schnyder's theorem in graph theory is a planarity characterization for graphs ... poset $P(G)$ of a graph G with vertex set V and edge ... incident to $x$. Schnyder's theorem states that a graph G is ...
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Immerman-Szelepcsényi theorem
Immerman-Szelepcsényi theorem The Immerman-Szelepsényi Theorem was proven independently by Neil Immerman and ... Gödel Prize. In its general form the theorem states that NSPACE = co-NSPACE. In other ... st-non-connectivity is an algorithm on graph G with n vertices that outputs "TRUE ... no path from s to t in graph G}. In order to illustrate that ...
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