# classifying

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**Baum–Connes conjecture**— In mathematics, specifically in operator K theory, the Baum ndash;Connes conjecture suggests a link between the C* algebra of a group and the K homology of the corresponding classifying space of proper actions of that group.It thus sets up a… …82

**Morgan, William Wilson**— ▪ 1995 U.S. astronomer (b. Jan. 3, 1906, Bethesda, Tenn. d. June 21, 1994, Williams Bay, Wis.), discovered the spiral shape of the Milky Way Galaxy after years of observing and analyzing the distances and arrangements of stars. Morgan s… …83

**"B" reader**— A B reader is a physician certified by the National Institute for Occupational Safety and Health (NIOSH) as demonstrating proficiency in classifying radiographs of the pneumoconioses. Contents 1 History 2 Objectives of the B reader program 3… …84

**Invisible Web**— The Deep Web (also called Deepnet, the invisible Web, DarkNet, Undernet, or the hidden Web) refers to World Wide Web content that is not part of the Surface Web, which is indexed by standard search engines. Mike Bergman, founder of… …85

**Neighbourhood components analysis**— is a supervised learning method for clustering multivariate data into distinct classes according to a given distance metric over the data. Functionally, it serves the same purposes as the K nearest neighbour algorithm, and makes direct use of a… …86

**Online community**— An online community is a virtual community that exists online and whose members enable its existence through taking part in membership ritual. An online community can take the form of an information system where anyone can post content, such as a …87

**Khmer language**— Khmer ភាសាខ្មែរ Pronunciation IPA: [pʰiːəsaː kʰmaːe] Spoken in Cambodia, Vietnam, Thailand, USA, France …88

**Carl Linnaeus**— Linneus redirects here. For other uses of Linnaeus/Linneus or Linné/Linne, see Linnaeus (disambiguation). For his less well known son, L.f., see Carl Linnaeus the Younger …89

**Classification of finite simple groups**— Group theory Group theory …90

**Computational complexity theory**— is a branch of the theory of computation in theoretical computer science and mathematics that focuses on classifying computational problems according to their inherent difficulty, and relating those classes to each other. In this context, a… …