bn:03391218n
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In functional analysis, a branch of mathematics, a compact operator is a linear operator T : X → Y {\displaystyle T:X\to Y}, where X, Y {\displaystyle X,Y} are normed vector spaces, with the property that T {\displaystyle T} maps bounded subsets of X {\displaystyle X} to relatively compact subsets of Y {\displaystyle Y}. Wikipedia
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