Linear inessential operators and generalized inverses

Bruce A. Barnes

Commentationes Mathematicae Universitatis Carolinae (2009)

  • Volume: 50, Issue: 1, page 75-82
  • ISSN: 0010-2628

Abstract

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The space of inessential bounded linear operators from one Banach space X into another Y is introduced. This space, I ( X , Y ) , is a subspace of B ( X , Y ) which generalizes Kleinecke’s ideal of inessential operators. For certain subspaces W of I ( X , Y ) , it is shown that when T B ( X , Y ) has a generalized inverse modulo W , then there exists a projection P B ( X ) such that T ( I - P ) has a generalized inverse and T P W .

How to cite

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Barnes, Bruce A.. "Linear inessential operators and generalized inverses." Commentationes Mathematicae Universitatis Carolinae 50.1 (2009): 75-82. <http://eudml.org/doc/32481>.

@article{Barnes2009,
abstract = {The space of inessential bounded linear operators from one Banach space $X$ into another $Y$ is introduced. This space, $I(X,Y)$, is a subspace of $B(X,Y)$ which generalizes Kleinecke’s ideal of inessential operators. For certain subspaces $W$ of $\,I(X,Y)$, it is shown that when $T\in B(X,Y)$ has a generalized inverse modulo $W$, then there exists a projection $P\in B(X)$ such that $T(I-P)$ has a generalized inverse and $TP\in W$.},
author = {Barnes, Bruce A.},
journal = {Commentationes Mathematicae Universitatis Carolinae},
keywords = {inessential operator; Fredholm operator; generalized inverse; inessential operator; Fredholm operator; generalized inverse},
language = {eng},
number = {1},
pages = {75-82},
publisher = {Charles University in Prague, Faculty of Mathematics and Physics},
title = {Linear inessential operators and generalized inverses},
url = {http://eudml.org/doc/32481},
volume = {50},
year = {2009},
}

TY - JOUR
AU - Barnes, Bruce A.
TI - Linear inessential operators and generalized inverses
JO - Commentationes Mathematicae Universitatis Carolinae
PY - 2009
PB - Charles University in Prague, Faculty of Mathematics and Physics
VL - 50
IS - 1
SP - 75
EP - 82
AB - The space of inessential bounded linear operators from one Banach space $X$ into another $Y$ is introduced. This space, $I(X,Y)$, is a subspace of $B(X,Y)$ which generalizes Kleinecke’s ideal of inessential operators. For certain subspaces $W$ of $\,I(X,Y)$, it is shown that when $T\in B(X,Y)$ has a generalized inverse modulo $W$, then there exists a projection $P\in B(X)$ such that $T(I-P)$ has a generalized inverse and $TP\in W$.
LA - eng
KW - inessential operator; Fredholm operator; generalized inverse; inessential operator; Fredholm operator; generalized inverse
UR - http://eudml.org/doc/32481
ER -

References

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  2. Barnes B., Generalized inverses of operators in some subalgebras of B ( X ) , Acta Sci. Math. (Szeged) 69 (2003), 349--357. (2003) Zbl1063.47029MR1991672
  3. Barnes B., Murphy G., Smyth R., and West T.T., Riesz and Fredholm Theory in Banach Algebras, Research Notes in Mathematics 67, Pitman, Boston, 1982. MR0668516
  4. Caradus S., Generalized Inverses and Operator Theory, Queen's Papers in Pure and Applied Math. 50, Queen's University, Kingston, Ont., 1978. Zbl0434.47003MR0523736
  5. Caradus S., Pfaffenberger W., Yood B., Calkin Algebras and Algebras of Operators on Banach Spaces, Lecture Notes in Pure and Applied Math., Vol. 9, Marcel Dekker, New York, 1974. Zbl0299.46062MR0415345
  6. Jörgens K., Linear Integral Operators, Pitman, Boston, 1982. MR0647629
  7. Kleinecke D., 10.1090/S0002-9939-1963-0155197-5, Proc. Amer. Math. Soc. 14 (1963), 863--868. (1963) Zbl0117.34201MR0155197DOI10.1090/S0002-9939-1963-0155197-5
  8. Lay D., Taylor A., Introduction to Functional Analysis, John Wiley and Sons, New York, 1980. Zbl0654.46002MR0564653
  9. Palmer T., Banach Algebras and the General Theory of *-Algebras, Vol. 1, Encyclopedia of Mathematics and its Applications 49, Cambridge University Press, Cambridge, 1994. MR1270014
  10. Rakočević V., A note on regular elements in Calkin algebras, Collect. Math. 43 (1992), 37--42. (1992) MR1214221

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