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U is used in the symbol of the World War II organization Ustaše. U is an honorific in Burmese. Related characters Ancestors, descendants and siblings. 𐤅 : Semitic letter Waw, from which the following symbols originally derive Υ υ : Greek letter Upsilon, from which U derives V v : Latin letter V, descended from U
Subderivative. A convex function (blue) and "subtangent lines" at (red). In mathematics, subderivatives (or subgradient) generalizes the derivative to convex functions which are not necessarily differentiable. The set of subderivatives at a point is called the subdifferential at that point. [1] Subderivatives arise in convex analysis, the study ...
Milne-Thomson method for finding a holomorphic function. In mathematics, the Milne-Thomson method is a method for finding a holomorphic function whose real or imaginary part is given. [1] It is named after Louis Melville Milne-Thomson .
Polarization identity. In linear algebra, a branch of mathematics, the polarization identity is any one of a family of formulas that express the inner product of two vectors in terms of the norm of a normed vector space. If a norm arises from an inner product then the polarization identity can be used to express this inner product entirely in ...
Conjectured in. 1939. Equivalent to. Dixmier conjecture. In mathematics, the Jacobian conjecture is a famous unsolved problem concerning polynomials in several variables. It states that if a polynomial function from an n -dimensional space to itself has Jacobian determinant which is a non-zero constant, then the function has a polynomial inverse.
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List of U-boat types contains lists of the German U-boat types (submarine classes) used in World War I and World War II. The anglicized word U-boat is usually only used as reference for German submarines in the two World Wars and therefore postwar submarine in the Bundesmarine and later German Navy are not included.
V-statistic. V-statistics are a class of statistics named for Richard von Mises who developed their asymptotic distribution theory in a fundamental paper in 1947. [1] V-statistics are closely related to U-statistics [2] [3] (U for "unbiased") introduced by Wassily Hoeffding in 1948. [4] A V-statistic is a statistical function (of a sample ...