Zobrazeno 1 - 10
of 16 565
pro vyhledávání: '"Strong, K"'
Autor:
Sferruzza, Tommaso, Tomassini, Adriano
We study the interplay between geometrically-Bott-Chern-formal metrics and SKT metrics. We prove that a $6$-dimensional nilmanifold endowed with a invariant complex structure admits an SKT metric if and only if it is geometrically-Bott-Chern-formal.
Externí odkaz:
http://arxiv.org/abs/2402.02537
Akademický článek
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Autor:
Balun, Jiří, Masopust, Tomáš
Opacity is an important system-theoretic property expressing whether a system may reveal its secret to a passive observer (an intruder) who knows the structure of the system but has only limited observations of its behavior. Several notions of opacit
Externí odkaz:
http://arxiv.org/abs/2204.01286
Autor:
Sferruzza, Tommaso, Tomassini, Adriano
We provide families of compact astheno-K\"ahler nilmanifolds and we study the behaviour of the complex blowup of such manifolds. We prove that the existence of an astheno-K\"ahler metric satisfying an extra differential condition is not preserved by
Externí odkaz:
http://arxiv.org/abs/2206.06904
In this paper, we revisit the verification of strong K-step opacity (K-SSO) for partially-observed discrete-event systems modeled as nondeterministic finite-state automata. As a stronger version of the standard K-step opacity, K-SSO requires that an
Externí odkaz:
http://arxiv.org/abs/2204.04698
Autor:
Fuhrmeister, B., Czesla, S., Nagel, E., Reiners, A., Schmitt, J. H. M. M., Jeffers, S. V., Caballero, J. A., Shulyak, D., Johnson, E. N., Zechmeister, M., Montes, D., López-Gallifa, Á., Ribas, I., Quirrenbach, A., Amado, P. J., Galadí-Enríquez, D., Hatzes, A. P., Kürster, M., Danielski, C., Béjar, V. J. S., Kaminski, A., Morales, J. C., Osorio, M. R. Zapatero
Publikováno v:
A&A 657, A125 (2022)
There are several strong K I lines found in the spectra of M dwarfs, among them the doublet near 7700 AA and another doublet near 12 500 AA. We study these optical and near-infrared doublets in a sample of 324 M dwarfs, observed with CARMENES, the hi
Externí odkaz:
http://arxiv.org/abs/2111.01552
Publikováno v:
In Journal of Rare Earths March 2023 41(3):374-380
Autor:
Piovani, Riccardo, Sferruzza, Tommaso
Existence of strong K\"ahler with torsion metrics, shortly SKT metrics, on complex manifolds has been shown to be unstable under small deformations. We find necessary conditions under which the property of being SKT is stable for a smooth curve of He
Externí odkaz:
http://arxiv.org/abs/2008.11983
Autor:
Wang, Ruixia, Zhang, Hui
Let $k$ be an integer with $k\geq 2$. A digraph $D$ is $k$-quasi-transitive, if for any path $x_0x_1\ldots x_k$ of length $k$, $x_0$ and $x_k$ are adjacent. Suppose that there exists a path of length at least $k+2$ in $D$. Let $P$ be a shortest path
Externí odkaz:
http://arxiv.org/abs/2006.06333