Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Gorazd Lešnjak"'
Publikováno v:
2020 International Conference on Broadband Communications for Next Generation Networks and Multimedia Applications (CoBCom).
Two electrically thick body BoR monopole antennas are proposed with enhanced antennas gain performances. Both antennas are designed above infinite ground plane, fed with coaxial cable and to operate in frequency range from 0.3 GHz to 1.2 GHz. Voltage
Autor:
Nung-Sing Sze, Gorazd Lešnjak
Publikováno v:
Linear Algebra and its Applications. 414:383-388
We show that every injective Jordan semi-triple map on the algebra M n ( F ) of all n × n matrices with entries in a field F (i.e. a map Φ : M n ( F ) → M n ( F ) satisfying Φ ( ABA ) = Φ ( A ) Φ ( B ) Φ ( A ) for every A and B in M n ( F ) )
Autor:
Gorazd Lešnjak
Publikováno v:
Linear Algebra and its Applications. 388:295-299
We characterize complex square matrices with the property that each of their orthogonal decompositions is rank additive.
Autor:
Gorazd Lešnjak
Publikováno v:
Linear Algebra and its Applications. 304(1-3):109-118
Some known results about EP matrices are studied in the setting of a finite dimensional inner product space over R or C . A characterization of semigroups of EP linear maps is given. The results obtained are generalized for bounded EP operators on Hi
Autor:
Gorazd Lešnjak
Publikováno v:
Publicationes Mathematicae Debrecen. 53:207-215
Autor:
Gorazd Lešnjak, Peter Šemrl
Publikováno v:
Proceedings of the American Mathematical Society. 126:127-133
Let X X and Y Y be compact Hausdorff topological spaces, and let C ( X ) C(X) and C ( Y ) C(Y) be real Banach algebras of all real-valued continuous functions on X X and Y Y , respectively. The general form of continuous multiplicative mappings Φ :
Autor:
Peter Šemrl, Gorazd Lešnjak
Publikováno v:
Linear and Multilinear Algebra. 40:373-377
We introduce two definitions of a quasidirect sum of bounded linear operators acting on Hilbert spaces and prove the corresponding structural theorems.
Publikováno v:
Topics in Operator Theory ISBN: 9783034601573
The linear dependence property of two Hilbert space operators is expressed in terms of equality of size of values of certain sesquilinear and quadratic forms associated with the operators. The forms are based on qnumerical ranges.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d8fb6d355956c4d436ac868499087134
https://doi.org/10.1007/978-3-0346-0158-0_23
https://doi.org/10.1007/978-3-0346-0158-0_23
Autor:
Gorazd Lešnjak
Publikováno v:
Linear Algebra and its Applications. (1-3):75-80
The entrywise convergence of the constrained powers PA n Q of matrices is investigated. A new proof of the characterization of convergence, obtained recently by R.E. Hartwig and P. Semrl [Rocky Mt. J. Math. 29 (1) (1999) 177], is presented. As an imp
Publikováno v:
Linear Algebra and its Applications. (2-3):255-279
Let F be a field and n ⩾ 3 . Suppose S 1 , S 2 ⊆ M n ( F ) contain all rank-one idempotents. The structure of surjections ϕ : S 1 → S 2 satisfying ABA = 0 ⇔ ϕ ( A ) ϕ ( B ) ϕ ( A ) = 0 is determined. Similar results are also obtained for