open subset
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Open set — Example: The points (x, y) satisfying x2 + y2 = r2 are colored blue. The points (x, y) satisfying x2 + y2 < r2 are colored red. The red points form an open set. The blue points form a closed set. The union of the red and blue points is a… … Wikipedia
Open mapping theorem (complex analysis) — In complex analysis, the open mapping theorem states that if U is a connected open subset of the complex plane C and f : U → C is a non constant holomorphic function, then f is an open map (i.e. it sends open subsets of U to open subsets of… … Wikipedia
Open and closed maps — In topology, an open map is a function between two topological spaces which maps open sets to open sets.[1] That is, a function f : X → Y is open if for any open set U in X, the image f(U) is open in Y. Likewise, a closed map is a function… … Wikipedia
Open content — or OpenContent is a neologism coined by David Wiley in 1998[1] which describes a creative work that others can copy or modify. The term evokes open source, which is a related concept in software.[2] When the term OpenContent was first used by… … Wikipedia
Open gaming — is the movement within the role playing game (RPG) industry that is somewhat similar to the open source movement.[1] The key aspect is that authors give recipients of works covered by copyright a license to certain rights, such as the right to… … Wikipedia
Open-cis — is a GUI based, full featured, and comprehensive customer information and billing system (CIS) owned by Accenture. Open cIS is designed on a flexible three tiered (client/server/database) component object model (COM+) platform in such a way that… … Wikipedia
Open Firmware — Open Firmware, or OpenBoot in Sun Microsystems parlance, is a standard defining the interfaces of a computer firmware system, formerly endorsed by the Institute of Electrical and Electronics Engineers (IEEE). It originated at Sun, and has been… … Wikipedia
Open source software security — is the measure of assurance or guarantee in the freedom from danger and risk inherent to an open source software system. Contents 1 The debate 1.1 Benefits of open source security 1.2 Drawbacks of open source security … Wikipedia
Open XML Paper Specification — (OpenXPS) Filename extension .oxps, .xps Internet media type application/oxps, application/vnd.ms xpsdocument Developed by Micro … Wikipedia
Open Watcom Assembler — Original author(s) Open Watcom Assembler Operating system Microsoft Windows, Unix like, OS/2, Mac OS, DOS Available in English … Wikipedia
Open Financial Exchange — Filename extension .ofx Developed by Microsoft, Intuit and CheckFree Initial release February 14, 1997[1] Latest release 2.1.1 … Wikipedia
