Janko Bračič
University of Ljubljana
36 Papers
117 Citations
Janko Bračič is an academic researcher from University of Ljubljana. The author has contributed to research in topics: Hilbert space & Banach space. The author has an hindex of 6, co-authored 33 publications.
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Papers
Local spectrum and local spectral radius of an operator at a fixed vector
Janko Bračič,Vladimír Müller +1 more
TL;DR: In this paper, it was shown that the set of operators T 2 L(X) with T (e) = (T ), respectively rT (e = r(T ), is residual.
•Posted Content
On Automatic Continuity of 3-Homomorphisms on Banach Algebras
TL;DR: In this article, the authors investigate 3-homomorphisms on Banach algebras with bounded approximate identities and establish that every involution preserving homomorphism between $C^*$-algebra is norm decreasing.
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•Journal Article
On Automatic Continuity of 3-Homomorphisms on Banach Algebras
TL;DR: In this article, the authors investigated 3-homomorphisms on Banach algebras with bounded approximate identities and established that every involution preserving homomorphism between C -algebra is norm decreasing.
Reflexivity defect of spaces of linear operators
Janko Bračič,Bojan Kuzma +1 more
TL;DR: For a finite-dimensional linear subspace S ⊆ L (V, W ) and a positive integer k, the k-reflexivity defect of S is defined by rd k (S ) = dim (Ref k ( S ) / S ), where Ref k(S ) is the k -reflexive closure of S as mentioned in this paper.
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Localizations of the kleinecke-shirokov theorem
Janko Bračič,Bojan Kuzma +1 more
TL;DR: In this article, an improved bound on the nilindex of a commutator is obtained as a consequence of an improved version of the Kleinecke-Shirokov theorem.