Zobrazeno 1 - 10
of 932
pro vyhledávání: '"Zalar P"'
Autor:
Yoo, Seonguk, Zalar, Aljaž
In this article we study the bivariate truncated moment problem (TMP) of degree $2k$ on reducible cubic curves. First we show that every such TMP is equivalent after applying an affine linear transformation to one of 8 canonical forms of the curve. T
Externí odkaz:
http://arxiv.org/abs/2403.01408
A linear map $\Phi$ between matrix spaces is called cross-positive if it is positive on orthogonal pairs $(U,V)$ of positive semidefinite matrices in the sense that $\langle U,V\rangle:=\text{Tr}(UV)=0$ implies $\langle \Phi(U),V\rangle\geq0$, and is
Externí odkaz:
http://arxiv.org/abs/2401.17425
An $n\times n$ symmetric matrix $A$ is copositive if the quadratic form $x^TAx$ is nonnegative on the nonnegative orthant. The cone of copositive matrices strictly contains the cone of completely positive matrices, i.e., all matrices of the form $BB^
Externí odkaz:
http://arxiv.org/abs/2305.16224
Autor:
Zalar, Aljaž
In this paper we study the bivariate truncated moment problem (TMP) on curves of the form $y=q(x)$, $q(x)\in \mathbb{R}[x]$, $\text{deg } q\geq 3$, and $yx^\ell=1$, $\ell\in \mathbb{N}\setminus\{1\}$. For even degree sequences the solution based on t
Externí odkaz:
http://arxiv.org/abs/2212.01645
Publikováno v:
Zbornik Matice Srpske za Prirodne Nauke, Vol 2011, Iss 120, Pp 7-18 (2011)
Wallemia is a genus of cosmopolitan xerophilic fungi, frequently involved in food spoilage of particularly sweet, salty, and dried food. Until recently, only a single species, Wallemia sebi, was recognized in the genus. When a large group of strains
Externí odkaz:
https://doaj.org/article/76b08a6dc3504660aa21a2d86820f457
Publikováno v:
Applied Sciences, Vol 14, Iss 16, p 7429 (2024)
A significant part of our stone heritage is made of limestone. Researchers are increasingly concerned about the risk of biodeterioration of these important objects. In this article, we present an up-to-date review of the microbial diversity of biodet
Externí odkaz:
https://doaj.org/article/4c8aa3c7045b412b96903372420db2c5
Autor:
Zalar, Aljaž
Publikováno v:
Linear Algebra and Its Applications 649, 2022, 186--239
In this article we study the bivariate truncated moment problem (TMP) of degree $2k$ on the union of parallel lines. First we present an alternative proof of Fialkow's solution \cite{Fia15} to the TMP on the union of two parallel lines (TMP--2pl) usi
Externí odkaz:
http://arxiv.org/abs/2105.00662
Autor:
Zalar, Aljaž
Publikováno v:
J. Math. Anal. Appl. 516 (2022)
The strong truncated Hamburger moment problem (STHMP) of degree $(-2k_1,2k_2)$ asks to find necessary and sufficient conditions for the existence of a positive Borel measure, supported on $\mathbb{R}\setminus \{0\}$, such that $\beta_i=\int x^id\mu\;
Externí odkaz:
http://arxiv.org/abs/2101.00486
Autor:
Lavrič, M., Derets, N., Črešnar, D., Cresta, V., Domenici, V., Rešetič, A., Skačej, G., Sluban, M., Umek, P., Zalar, B., Kutnjak, Z., Rožič, B.
Publikováno v:
Liquid Crystals, Published online: 09 Jul 2020
Materials exhibiting a large caloric effect could lead to the development of new generation of heat-management technologies that will have better energy efficiency and be potentially more environmentally friendly. The focus of caloric materials inves
Externí odkaz:
http://arxiv.org/abs/2012.05605
Autor:
Zalar, Aljaž
Publikováno v:
Integr. Equ. Oper. Theory (93) 2021
In this article we solve four special cases of the truncated Hamburger moment problem (THMP) of degree $2k$ with one or two missing moments in the sequence. As corollaries we obtain, by using appropriate substitutions, the solutions to bivariate trun
Externí odkaz:
http://arxiv.org/abs/2007.11846