Zobrazeno 1 - 10
of 2 883
pro vyhledávání: '"Ivkovic, A."'
The representations that can be defined starting from positive sesquilinear maps {\Phi} with values in an ordered Banach module are essentially of two types: if {\Phi} is positive, a natural generalization follows the path of the GNS construction; if
Externí odkaz:
http://arxiv.org/abs/2410.24113
Autor:
Csanády, Bálint, Nagy, Lóránt, Boros, Dániel, Ivkovic, Iván, Kovács, Dávid, Tóth-Lakits, Dalma, Márkus, László, Lukács, András
We present a purely deep neural network-based approach for estimating long memory parameters of time series models that incorporate the phenomenon of long-range dependence. Parameters, such as the Hurst exponent, are critical in characterizing the lo
Externí odkaz:
http://arxiv.org/abs/2410.03776
The C++ programming language and its cousins lean towards a memory-inefficient storage of structs: The compiler inserts helper bits into the struct such that individual attributes align with bytes, and it adds additional bytes aligning attributes wit
Externí odkaz:
http://arxiv.org/abs/2406.06095
Autor:
Ivkovic, Stefan
In this paper, we characterize supercyclic weighted composition operators on various function spaces. Moreover, we also characterize supercyclic adjoint of the weighted composition operator and supercyclic left multipliers acting on the space of comp
Externí odkaz:
http://arxiv.org/abs/2406.06011
Publikováno v:
Positivity (2024)
In this paper, we provide a representation of a certain class of C*-valued positive sesquilinear and linear maps on non-unital quasi *-algebras. Also, we illustrate our results on the concrete examples of non-unital Banach quasi *-algebras, such as t
Externí odkaz:
http://arxiv.org/abs/2405.09387
Publikováno v:
Mediterranean Journal of Mathematics (2024)
The GNS construction for positive invariant sesquilinear forms on quasi *-algebras is generalized to a class of positive C*-valued sesquilinear maps on quasi *-algebras. The result is a *-representation taking values in a space of operators acting on
Externí odkaz:
http://arxiv.org/abs/2403.16597
Autor:
Ivkovic, Stefan
In this paper, we extend Fredholm theory in von Neumann algebras established by Breuer in [5] and [6] to spectral Fredholm theory. We consider 2 by 2 upper triangular operator matrices with coefficients in a von Neumann algebra and give the relations
Externí odkaz:
http://arxiv.org/abs/2403.10526
This research explores the reliability of deep learning, specifically Long Short-Term Memory (LSTM) networks, for estimating the Hurst parameter in fractional stochastic processes. The study focuses on three types of processes: fractional Brownian mo
Externí odkaz:
http://arxiv.org/abs/2401.01789
Autor:
Ivkovic, Stefan
In this paper, we study the dynamics of the adjoint of a weighted composition operator and we give necessary and sufficient conditions for this adjoint operator to be topologically hyper-transitive on the space of Radon measures on a locally compact
Externí odkaz:
http://arxiv.org/abs/2310.10868
Autor:
Maja Pantovic-Stefanovic, Jelena Karanovic, Vladimir Jurisic, Bojana Dunjic-Kostic, Milica Nesic, Sara Dodic, Marta Gostiljac, Marija Puric, Dusanka Savic Pavicevic, Maja Ivkovic
Publikováno v:
BMC Psychiatry, Vol 24, Iss 1, Pp 1-12 (2024)
Abstract Background Although repeatedly confirmed, the molecular nature of gene-environment (GxE) interactions has rarely been investigated in the clinical context of mood disorders. This study assesses the relationship between HTR2A genetic variants
Externí odkaz:
https://doaj.org/article/658e14ea222d4ff893d7aa1d7f9a5e44
