Zobrazeno 1 - 10
of 1 448
pro vyhledávání: '"Varandas, P."'
We introduce a class of linear bounded invertible operators on Banach spaces, called shift operators, which comprises weighted backward shifts and models finite products of weighted backward shifts and dissipative composition operators. We classify v
Externí odkaz:
http://arxiv.org/abs/2407.20890
Impulsive dynamical systems, modeled by a continuous semiflow and an impulse function, may be discontinuous and may have non-intuitive topological properties, as the non-invariance of the non-wandering set or the non-existence of invariant probabilit
Externí odkaz:
http://arxiv.org/abs/2405.04667
Autor:
Ana Matos, André Gomes-dos-Santos, Amílcar Teixeira, Simone Varandas, Ronaldo Sousa, Ioannis Karaouzas, Stamatis Zogaris, Elsa Froufe, Manuel Lopes-Lima
Publikováno v:
Mitochondrial DNA. Part B. Resources, Vol 9, Iss 6, Pp 696-700 (2024)
Freshwater mussels (Bivalvia, Unionida) play essential roles in the well-functioning of ecosystems, even providing essential services to humans. However, these bivalves face numerous threats (e.g. habitat loss and fragmentation, pollution, introducti
Externí odkaz:
https://doaj.org/article/4067f81340db4f94afa2797c3ae61586
Autor:
Melbourne, Ian, Varandas, Paulo
Given an Axiom A attractor for a $C^{1+\alpha}$ flow ($\alpha>0$), we construct a countable Markov extension with exponential return times in such a way that the inducing set is a smoothly embedded unstable disk. This avoids technical issues concerni
Externí odkaz:
http://arxiv.org/abs/2302.12363
Autor:
Bomfim, Thiago, Varandas, Paulo
In this paper we consider $C^1$ surface diffeomorphisms and study the existence of phase transitions, here expressed by the non-analiticity of the pressure function associated to smooth and geometric-type potentials. We prove that the space of $C^1$-
Externí odkaz:
http://arxiv.org/abs/2301.10238
Publikováno v:
Reactions, Vol 5, Iss 1, Pp 246-259 (2024)
Computer simulation is a crucial element in the design of chemical processes. Although numerous commercial software options are widely recognized, the expense associated with acquiring and sustaining valid software licenses can be prohibitive. In con
Externí odkaz:
https://doaj.org/article/f74978b5a234416cbea8022c380d16d2
Publikováno v:
Acta Médica Portuguesa, Vol 37, Iss 6 (2024)
N/a.
Externí odkaz:
https://doaj.org/article/93f7a876ad2e4b5fa10fabe5fa7a4e24
Autor:
Anibal Rodrigues Neto, Bianca Bicalho, Giovanna Maria Varandas, Adriano Torres Antonucci, Gabriel Gomes Freitas de Castro, Shiro Manoel Shimoakoishi de Arruda, Marcel Schiavini, Lutero Cleuler Moraes dos Santos, Márcio Francisco Lehmann, Francisco Spessatto Pesente
Publikováno v:
Brazilian Neurosurgery, Vol 43, Iss 02, Pp e117-e120 (2024)
Introduction Schwannoma is a Schwann cells neoplasm that can occur in various parts of the nervous system, including the medullar region of the cauda equina. Bone involvement is uncommon.
Externí odkaz:
https://doaj.org/article/c9df4a64e8d44951b88e68f8784c68ca
SiC$_2$ is a fascinating molecule due to its unusual bonding and astrophysical importance. In this work, we report the first global potential energy surface (PES) for ground-state SiC$_2$ using the combined-hyperbolic-inverse-power-representation (CH
Externí odkaz:
http://arxiv.org/abs/2208.05203
We prove that the homeomorphisms of a compact manifold with dimension one have zero topological emergence, whereas in dimension greater than one the topological emergence of a C^0-generic conservative homeomorphism is maximal, equal to the dimension
Externí odkaz:
http://arxiv.org/abs/2208.00962