KnowraCompact operatorLinked fromLinked fromThe 9 pages that link to Compact operator, each with the reason it gives.All 9Broader topic 2Related 5Narrower topic 2Fredholm alternativeNarrower topic: Compactness is the hypothesis that makes identity-perturbed operators obey the alternative.Fredholm theoryNarrower topic: Compact perturbations preserve Fredholmness and leave the index unchanged.