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Everything about Compact operator

Type of continuous linear operator

In functional analysis, a branch of mathematics, a compact operator is a linear operator that behaves, in several important respects, like a finite-dimensional operator such as a matrix. In infinite-dimensional spaces, bounded sets are usually not compact, and bounded sequences need not have convergent subsequences. Compact operators partly restore this finite-dimensional behavior by sending bounded sets to sets whose closures are compact, or equivalently, in normed spaces, by sending bounded sequences to sequences with convergent subsequences. Wikipedia →

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  1. Read the overview: Compact operatorA 5-minute orientation
  2. Skim a recent paper: Deep learning-enabled compact optical trigonometric operator with metasurfaceInfluential work since 2022
  3. Pick up a classic book: Functional analysisThe most-reprinted book on the subject
  4. Read the landmark paper: Improvement by iteration for compact operator equationsCited 109 times
  5. Go sideways: Glossary of functional analysisA closely related topic
  6. Go sideways: Fredholm alternativeA closely related topic

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