affine type system wikipedia - EAS

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  1. G2

    From Wikipedia, the free encyclopedia The affine root system of type G2. In mathematics, an affine root system is a root system of affine-linear functions on a Euclidean space. They are used in the classification of affine Lie algebras and superalgebras, and semisimple p -adic algebraic groups, and correspond to families of Macdonald polynomials.
    en.wikipedia.org/wiki/Affine_root_system
    en.wikipedia.org/wiki/Affine_root_system
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    What is the difference between affine and relevant type systems?
    Affine type systems (allow exchange and weakening, but not contraction): Every variable is used at most once. Relevant type systems (allow exchange and contraction, but not weakening): Every variable is used at least once. Normal type systems (allow exchange, weakening and contraction): Every variable may be used arbitrarily.
    en.wikipedia.org/wiki/Substructural_type_system
    What is an affine map?
    As shown above, an affine map is the composition of two functions: a translation and a linear map. Ordinary vector algebra uses matrix multiplication to represent linear maps, and vector addition to represent translations.
    en.wikipedia.org/wiki/Affine_transformation
    What is the difference between affine map and semiaffine transformation?
    A map f: X → Z is an affine map if there exists a linear map mf : V → W such that mf (x − y) = f (x) − f (y) for all x, y in X. Let (X, V, k) be an affine space of dimension at least two, with X the point set and V the associated vector space over the field k. A semiaffine transformation f of X is a bijection of X onto itself satisfying:
    en.wikipedia.org/wiki/Affine_transformation
    What is the difference between ordered and Affine types?
    The explanation for affine type systems is best understood if rephrased as “every occurrence of a variable is used at most once”. Ordered types correspond to noncommutative logic where exchange, contraction and weakening are discarded.
    en.wikipedia.org/wiki/Substructural_type_system
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    Affine root system - Wikipedia

    https://en.wikipedia.org/wiki/Affine_root_system

    Let E be an affine space and V the vector space of its translations.Recall that V acts faithfully and transitively on E.In particular, if u , v ∈ E {\displaystyle u,v\in E} , then it is well defined an element in V denoted as u − v {\displaystyle u-v} which is the only element w such that v + w = u {\displaystyle v+w=u} . Now suppose w…

     

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    The affine roots systems A1 = B1 = B∨ 1 = C1 = C∨ 1 are the same, as are the pairs B2 = C2, B∨ 2 = C∨ 2, and A3 = D3 The number of orbits given in the table is the number of orbits of sim

     

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    1. Macdonald (1972) showed that the affine root systems index Macdonald …
    2. Bruhat & Tits (1972) used affine root systems to study p-adic algebraic gro…
    3. Reduc…

     

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    1. Bruhat, F.; Tits, Jacques (1972), "Groupes réductifs sur un corps local"…
    2. Macd…

     

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  4. https://en.wikipedia.org/wiki/Type_system

    In programming languages, a type system is a logical system comprising a set of rules that assigns a property called a type to the various constructs of a computer program, such as variables, expressions, functions or modules. These types formalize and enforce the otherwise implicit categories the programmer uses for algebraic data types, data structures, or other components (e.g. "string", "array of float", "function returning boolean"). The main purpose of a type system is …

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    • Affine transformation - Wikipedia

      https://en.wikipedia.org/wiki/Affine_transformation

      Definition. Let (X, V, k) be an affine space of dimension at least two, with X the point set and V the associated vector space over the field k.A semiaffine …

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        What is the meaning of the term "affine"?
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      • https://en.wikipedia.org/wiki/Substructural_type_system

        Several type systems have emerged by discarding some of the structural rules of exchange, weakening, and contraction:
        • Ordered type systems (discard exchange, weakening and contraction): Every variable is used exactly once in the order it was introduced.
        • Linear type systems (allow exchange, but neither weakening nor contraction): Every variable is used exactly once.

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        • Affine logic - Wikipedia

          https://en.wikipedia.org/wiki/Affine_logic

          From Wikipedia, the free encyclopedia Affine logic is a substructural logic whose proof theory rejects the structural rule of contraction. It can also be characterized as linear logic with weakening. The name "affine logic" is associated with linear logic, to which it differs by allowing the weakening rule.

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          • lambda-the-ultimate.org/node/5316

            Mar 15, 2016 · Affine type systems (allow exchange and weakening, not contraction): Every variable is used at most once. Relevant type systems (allow exchange and contraction, not weakening): Every variable is used at least once. Ordered type systems (discard exchange, contraction and weakening): Every variable is used exactly once in the order it was introduced.

          • Affine variety - Encyclopedia of Mathematics

            https://encyclopediaofmath.org/wiki/Affine_variety

            An affine scheme is an affine variety if and only if it is isomorphic to a reduced closed subscheme of an affine space. Each system of generators $ x _ {1} \dots x _ {n} $ of a $ k $- algebra $ A $ defines a surjective homomorphism $ \phi : k [ T _ {1} \dots T _ {n} ] \rightarrow A $, defined by the formula $ \phi ( T _ {i} ) = x _ {i} $.

          • Linear or Affine Types? : ProgrammingLanguages - reddit

            https://www.reddit.com/.../linear_or_affine_types

            Since affine types only allow things to be used once, this means at any one time, only one action can be executed, since the compiler/language only supplies one thing of type io, and there is no way to increase the number. So for example you could do: Main io

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          • 15.4.1 Control-Affine Systems - LaValle

            planning.cs.uiuc.edu/node825.html

            15.4.1 Control-Affine Systems. 15. 4. 1 Control-Affine Systems. Nonholonomic system theory is restricted to a special class of nonlinear systems. The techniques of Section 15.4 utilize ideas from linear algebra. The main concepts will be formulated in terms of linear combinations of vector fields on a smooth manifold .

          • GitHub - AliasQli/Affine-HM

            https://github.com/AliasQli/Affine-HM

            Apr 01, 2022 · AliasQli. /. Affine-HM. Public. This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository. Use Git or checkout with SVN using the web URL. Work fast with our official CLI. Learn more . If nothing happens, download GitHub Desktop and try again.



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