e/Closed operator

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has glosseng: In mathematics, specifically in functional analysis, closed linear operators are an important class of linear operators on Banach spaces. They are more general than bounded operators, and therefore not necessarily continuous, but they still retain nice enough properties that one can define the spectrum and (with certain assumptions) functional calculus for such operators. Many important linear operators which fail to be bounded turn out to be closed, such as the derivative and a large class of differential operators.
lexicalizationeng: Closed operator
instance ofc/Bilinear forms
Meaning
German
has glossdeu: Abgeschlossene Operatoren werden in der Funktionalanalysis, einem Teilgebiet der Mathematik, betrachtet. Es handelt sich dabei um lineare Operatoren mit einer bestimmten topologischen Eigenschaft, die schwächer als Stetigkeit ist. Diese spielen eine bedeutende Rolle in der für die Quantenmechanik wichtige Theorie der dicht-definierten Operatoren.
lexicalizationdeu: Abgeschlossener Operator
French
lexicalizationfra: opérateur non borné
Italian
has glossita: In matematica, e più specificatamente in analisi funzionale, gli operatori lineari chiusi sono una importante classe di operatore lineari su uno spazio di Banach. Essi sono più generali degli operatori lineari limitati, e quindi non sono necessariamente continui, ma hanno lo stesso proprietà interessanti per definire lo spettro e (sotto certe assunzioni) un calcolo funzionale per tali operatori. Molti operatori lineari importanti che non sono limitati sono chiusi, come loperatore derivata e la grande classe degli operatori differenziali, per esempio in meccanica quantistica loperatore momento e l'operatore posizione.
lexicalizationita: Operatore lineare chiuso
Dutch
has glossnld: Een gesloten operator of voluit gesloten lineaire operator is een bijzondere soort lineaire transformatie van een topologische vectorruimte. Deze transformaties worden bestudeerd in de operatorentheorie, een onderdeel van de wiskundige functionaalanalyse. Gesloten operatoren vormen een belangrijk houvast wanneer continuïteit of begrensdheid te strenge eisen blijken.
lexicalizationnld: gesloten operator
Portuguese
has glosspor: Em matemática, especialmente na análise funcional, os operadores lineares fechados formam uma importante classe de operadores lineares em espaços de Banach. Todo operador linear limitado é fechado e muitos operadores lineares não-limitados de importância na matemática aplicada são fechados. A classe dos operadores fechados são suficientemente bem comportados a ponto de se poder desenvolver um teorema espectral para eles.
lexicalizationpor: operador fechado
Russian
has glossrus: Замкнутый оператор — это оператор, график которого замкнут. Это означает, что если x_n\to x и Ax_n\to y, то Ax=y.
lexicalizationrus: Замкнутый оператор
Castilian
has glossspa: Let B denote a Banach space. A linear operator :A\colon\mathcalD}(A)\subset B\to B is closed if for every sequence \x_n\}_n\in \mathbbN}} in \mathcalD}(A) converging to x\in B such that Ax_n\to y\in B as n\to\infty one has x\in\mathcalD}(A) and Ax = y. Equivalently, A is closed if its graph is closed in the direct sum B\oplus B.
lexicalizationspa: Operador cerrado

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