In convex geometry and vector algebra, a convex combination is a linear combination of points (which can be vectors, scalars, or more generally points...
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one can define the related concepts of affine combination, conical combination, and convex combination, and the associated notions of sets closed under...
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In geometry, the convex hull, convex envelope or convex closure of a shape is the smallest convex set that contains it. The convex hull may be defined...
58 KB (7,173 words) - 01:04, 1 July 2025
this property characterizes convex sets. Such an affine combination is called a convex combination of u1, ..., ur. The convex hull of a subset S of a real...
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non-empty convex compact set which does not contain the origin, then the convex conical hull of S is a closed set. Affine combination Convex combination Linear...
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{\displaystyle P} . Equivalently, x {\displaystyle x} can be written as the convex combination of d + 1 {\displaystyle d+1} or fewer points in P {\displaystyle P}...
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combinations of b→ with coefficients from the rows in A. Convex combination Conical combination Linear combination Affine space Affine geometry Affine hull Gallier...
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A convex polytope is a special case of a polytope, having the additional property that it is also a convex set contained in the n {\displaystyle n} -dimensional...
23 KB (3,264 words) - 16:42, 30 July 2025
is a state that can not be written as a probabilistic mixture, or convex combination, of other quantum states. There are several equivalent characterizations...
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Concave function (category Convex analysis)
the function value at any convex combination of elements in the domain is greater than or equal to that convex combination of those domain elements. Equivalently...
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expressed using coefficients that sum to one. Such a linear combination is called a convex combination. Using the previous example, we would get the following...
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combinations with positive coefficients. It follows that convex cones are convex sets. The definition of a convex cone makes sense in a vector space over any ordered...
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tight curves Combination – One edge of the blade is convexed, the opposite edge concaved, so the tool can be used on concaved and convexed surfaces. Spokeshaves...
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can be defined as a set X {\displaystyle X} equipped with a binary convex combination operation c λ : X × X → X {\displaystyle c_{\lambda }:X\times X\rightarrow...
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analysis and related areas of mathematics, locally convex topological vector spaces (LCTVS) or locally convex spaces are examples of topological vector spaces...
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for constrained convex optimization. Also known as the conditional gradient method, reduced gradient algorithm and the convex combination algorithm, the...
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it. For any system, the state space is a convex set: Any mixed state can be written as a convex combination of pure states, though not in a unique way...
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probability density function if it exists) can be expressed as a convex combination (i.e. a weighted sum, with non-negative weights that sum to 1) of...
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the convex combination 0.5 x + 0.5 y = ( 4 , 4 ) {\displaystyle 0.5x+0.5y=(4,4)} is worse than both of them since its utility is 4. A set of convex-shaped...
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Choquet theory (category Convex hulls)
more precise by generalizing the notion of weighted average from a convex combination to an integral taken over the set E of extreme points. Here C is a...
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List of convexity topics (category Convex geometry)
background color, thereby producing a new blended color. This is a convex combination of two colors allowing for transparency effects in computer graphics...
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Jensen's inequality (category Convex analysis)
mathematician Johan Jensen, relates the value of a convex function of an integral to the integral of the convex function. It was proved by Jensen in 1906, building...
31 KB (5,129 words) - 19:32, 12 June 2025
problems in mathematical programming can be formulated as problems on convex sets or convex bodies. Six kinds of problems are particularly important:: Sec.2 ...
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Convexity in economics (category Convex hulls)
induction, a set Q is convex if and only if every convex combination of members of Q also belongs to Q. By definition, a convex combination of an indexed subset {v0...
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_{1}P_{1}+\cdots +\theta _{k}P_{k}.} (Such a decomposition of X is known as a 'convex combination'.) A proof of the theorem based on Hall's marriage theorem is given...
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Extreme point (redirect from Extreme subset of convex set)
In mathematics, an extreme point of a convex set S {\displaystyle S} in a real or complex vector space is a point in S {\displaystyle S} that does not...
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\mathbb {Z} ^{n}} is integrally convex if any point y in the convex hull of X can be expressed as a convex combination of the points of X that are "near"...
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distributions of GBM, the lognormal mixture dynamics, resulting in a convex combination of Black Scholes prices for options. If instead we assume that the...
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algorithm) is an algorithm for decomposing a bistochastic matrix into a convex combination of permutation matrices. It was published by Garrett Birkhoff in 1946...
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separable states are multipartite quantum states that can be written as a convex combination of product states. Product states are multipartite quantum states...
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