Concepedia

Perturbation theory for nullity, deficiency and other quantities of linear operators

Journal d Analyse Mathématique · 1958 · 524 citations · 3 references

Concepts

Natural SciencesMathematicsDifferential EquationsDynamical SystemsMathematical PhysicsLinear AlgebraOperator TheoryPerturbation MethodsPerturbation TheoryLinear Perturbation TheoryMatrix Perturbation TheoryNon-degenerate Perturbation TheoryOperatorsPerturbation Of Linear OperatorsPerturbation Theory Of OperatorsTrace Of Linear Operators

References

3

Properties of linear transformations preserved under addition of a completely continuous transformation

Bertram Yood · Duke Mathematical Journal · 1951 · 88 citations

Natural Sciences, Property Law, Topology +7

On the stability of the index of unbounded linear transformations

Béla Nagy · Acta Mathematica Academiae Scientiarum Hungaricae · 1952 · 37 citations

Natural Sciences, Mathematics, Dynamical Systems +9

A spectral problem for completely continuous operators

F. V. Atkinson · Acta Mathematica Academiae Scientiarum Hungaricae · 1952 · 26 citations · Full text

Natural Sciences, Mathematics, Physics +12