*Bull. Austral. Math. Soc.* 72(3) pp.407--421, 2005.

# Similarity invariant semigroups generated by

non-Fredholm operators

## Iztok Kavkler |

.

## Abstract

Let

*A**B*() be a bounded non-compact operator that is not semi-Fredholm. The similarity invariant semigroup generated by*A*is shown to consist of all operators that are not semi-Fredholm and satisfy obvious inequalities for the nullity and co-nullity.#### Click to download PDF of this article (free access until July 2006)

#### or get the *no-frills* version

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(Metadata: XML, RSS, BibTeX) | MathSciNet: MR2199643 | Z'blatt-MATH: 1103.47029 |

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ISSN 0004-9727