null contour
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Null corrector — Testing a spherical mirror using an interferometer. All surfaces in the tester are either flat or spherical, so the tester itself is fairly easy to fabricate and test. This setup can test a spherical mirror of any size since the wavefront is… … Wikipedia
Syllable — For the computer operating system, see Syllable (operating system). A syllable is a unit of organization for a sequence of speech sounds. For example, the word water is composed of two syllables: wa and ter. A syllable is typically made up of a… … Wikipedia
Numerical continuation — is a method of computing approximate solutions of a system of parameterized nonlinear equations, The parameter λ is usually a real scalar, and the solution an n vector. For a fixed parameter value λ,, maps Euclidean n space into itself. Often the … Wikipedia
Standard Chinese phonology — The phonology of Standard Chinese is reproduced below. Actual production varies widely among speakers, as people inadvertently introduce elements of their native dialects. By contrast, television and radio announcers are chosen for their… … Wikipedia
Sesotho tonology — Notes: *All examples marked with Dagger; are included in the audio samples. If a table caption is marked then all Sesotho examples in that table are included in the audio samples. *The orthography used in this and related articles is that of… … Wikipedia
Geographic information system — GIS redirects here. For other uses, see GIS (disambiguation). A geographic information system, geographical information science, or geospatial information studies is a system designed to capture, store, manipulate, analyze, manage, and present… … Wikipedia
American and British English spelling differences — Spelling differences redirects here. For other uses, see Category:Language comparison. For guidelines on dialects and spelling in the English language version of Wikipedia, see Wikipedia:Manual of Style#National varieties of English. Differences… … Wikipedia
Lebesgue integration — In mathematics, the integral of a non negative function can be regarded in the simplest case as the area between the graph of that function and the x axis. Lebesgue integration is a mathematical construction that extends the integral to a larger… … Wikipedia
Ridgefield, New Jersey — Infobox Settlement official name = Ridgefield, New Jersey settlement type = Borough nickname = motto = imagesize = image caption = image imagesize = image caption = image mapsize = 250x200px map caption = Map highlighting Ridgefield s location… … Wikipedia
Saddle point — In mathematics, a saddle point is a point in the domain of a function of two variables which is a stationary point but not a local extremum. At such a point, in general, the surface resembles a saddle that curves up in one direction, and curves… … Wikipedia
United Kingdom — a kingdom in NW Europe, consisting of Great Britain and Northern Ireland: formerly comprising Great Britain and Ireland 1801 1922. 58,610,182; 94,242 sq. mi. (244,100 sq. km). Cap.: London. Abbr.: U.K. Official name, United Kingdom of Great… … Universalium
