Enrico Boasso

activity

20132017

most citedThe inverse along an element in rings with an involution, Banach algebras and

C^{*}

-algebras

10 citations · 37 across the 34 of their papers we have counts for

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Showing 2014Show all

10 papers · 1 filter

math.FA2014

On Cartan Joint Spectra

Enrico Boasso

In this work several results regarding the Cartan version of the Taylor, the Slodkowski, the Fredholm, the split and the Fredholm split joint spectra will be studied.

math.FA2014

Joint spectra of representations of Lie algebras by compact operators

Enrico Boasso

Given $X$ a complex Banach space, $L$ a complex nilpotent finite dimensional Lie algebra, and $ρ : L \to L (X)$ , a representation of $L$ in $X$ such that $ρ (l) \in K (X)$ for all $…

math.FA2014★ 1 cited

Regular Fredholm Pairs

Enrico Boasso

In this work it is introduced the notion of regular Fredholm pair, i.e. a Fredholm pair whose operators are regular. The main properties of these objects are studied, and what is m…

math.FA2014

The Drazin spectrum of tensor product of Banach algebra elements and elementary operators

Enrico Boasso

Given unital Banach algebras $A$ and $B$ and elements $a \in A$ and $b \in B$ , the Drazin spectrun of $a \otimes b \in A \otimes B$ will be fully characterized, where $A\over…

math.FA2014

Characterizations of Fredholm pairs and chains in Hilbert spaces

Enrico Boasso

In this work characterizations of Fredholm pairs and chains of Hilbert space operators are given. Following a well-known idea of several variable operator theory in Hilbert spaces,…

math.FA2014

Isolated spectral points and Koliha-Drazin invertible elements in quotient Banach algebras and homomorphism ranges

Enrico Boasso

In this article poles, isolated spectral points, group, Drazin and Koliha-Drazin invertible elements in the context of quotient Banach algebras or in ranges of (not necessarily con…

math.RA2014

On the weighted reverse order laws for the Moore-Penrose inverse and K-inverses

Enrico Boasso, Dragana S. Cvetkovic-Ilic, Robin Harte

The main objective of this article is to study several generalizations of the reverse order law for the Moore-Penrose inverse in ring with involution.

math.FA2014★ 1 cited

Tensor product of left polaroid operators

Enrico Boasso, B. P. Duggal

A Banach space operator $T \in B (X)$ is left polaroid if for each $λ \in iso σ_{a} (T)$ there is an integer $d (λ)$ such that asc $(T - λ) = d (λ) < \infty$ and $(T - λ)^{d (λ) + 1} X$ is closed…

math.FA2014

Property (gw) for tensor product and left-right multiplication operators

Enrico Boasso, B. P. Duggal

Given Banach spaces $X$ and $Y$ and operators $A \in B (X)$ and $B \in B (Y)$ , property $(g w)$ does not in general transfer from $A$ and $B$ to the tensor product operator $A\otimes B\…

math.FA2014

Weighted Moore-Penrose invertible and weighted EP Banach algebra elements

Enrico Boasso, Dragan S. Djordjevic, Dijana Mosic

The weighted Moore-Penrose inverse will be introduced and studied in the context of Banach algebras. In addition, weighted EP Banach algebra elements will be characterized. The Ban…