Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Cristina Pignotti"'
Autor:
Serge Nicaise, Cristina Pignotti
Publikováno v:
Electronic Journal of Differential Equations, Vol 2011, Iss 41,, Pp 1-20 (2011)
We study the stabilization problem by interior damping of the wave equation with boundary or internal time-varying delay feedback in a bounded and smooth domain. By introducing suitable Lyapunov functionals exponential stability estimates are obtaine
Externí odkaz:
https://doaj.org/article/5776776a23f24d19b3e21e9291f68f4c
Autor:
Piermarco Cannarsa, Cristina Pignotti
Publikováno v:
Le Matematiche, Vol 55, Iss 4, Pp 71-108 (2000)
A simple exit time problem with degenerate cos is here considered. Using a new technique for constructing admissible trajectories, a semiconcavity result for the value function ν is obtained. Such a property of ν is then applied to obtain optimalit
Externí odkaz:
https://doaj.org/article/79c9c7f10a5246c9bc0c180cec07b5f1
Publikováno v:
Mathematical Methods in the Applied Sciences. 44:4560-4579
In this paper, we study Hegselmann-Krause models with a time-variable time delay. Under appropriate assumptions, we show the exponential asymptotic consensus when the time delay satisfies a suitable smallness assumption. Our main strategies for this
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0e97aed6ae171572d38d1a29e5a1e9e8
https://doi.org/10.1002/mma.7050
https://doi.org/10.1002/mma.7050
Autor:
Cristina Pignotti, Young-Pil Choi
Publikováno v:
Networks & Heterogeneous Media. 14:789-804
We study a Cucker-Smale-type flocking model with distributed time delay where individuals interact with each other through normalized communication weights. Based on a Lyapunov functional approach, we provide sufficient conditions for the velocity al
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1e4d465f942742da46ddb8493ae80e53
https://doi.org/10.3934/nhm.2019032
https://doi.org/10.3934/nhm.2019032
Autor:
Serge Nicaise, Cristina Pignotti
Publikováno v:
Zeitschrift für angewandte Mathematik und Physik. 71
We analyze the stability of Maxwell equations in bounded domains taking into account electric and magnetization effects. Well-posedness of the model is obtained by means of semigroup theory. A passitivity assumption guarantees the boundedness of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b6939fd0be0f77df45d199cc0d040a3
https://doi.org/10.1007/s00033-020-01297-6
https://doi.org/10.1007/s00033-020-01297-6
Autor:
Alessandro Paolucci, Cristina Pignotti
In this paper we study a class of semilinear wave-type equations with viscoelastic damping and delay feedback with time variable coefficient. By combining semigroup arguments, careful energy estimates and an iterative approach we are able to prove, u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2c9f1e03c933a8a497aacc56f109a465
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
We give maximum principles for solutions u : Ω → R N to a class of quasilinear elliptic systems whose prototype is − ∑ i = 1 n ∂ ∂ x i ∑ β = 1 N ∑ j = 1 n a i , j α , β x , u ( x ) ∂ u β ∂ x j ( x ) = 0 , x ∈ Ω , where α
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c9e6f05dc818c4c91bdfdfeb3d96ef00
http://hdl.handle.net/11697/130585
http://hdl.handle.net/11697/130585
Autor:
Irene Reche Vallejo, Cristina Pignotti
Publikováno v:
Journal of Mathematical Analysis and Applications. 464:1313-1332
We analyze the Cucker–Smale model under hierarchical leadership in presence of a time delay. By using a Lyapunov functional approach and some induction arguments we will prove convergence to consensus for every positive delay τ. We also prove a fl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f5311fbffd83d323a2e16d5c41f64246
https://doi.org/10.1016/j.jmaa.2018.04.070
https://doi.org/10.1016/j.jmaa.2018.04.070
Publikováno v:
Discrete & Continuous Dynamical Systems - A. 37:725-742
We consider a Dirichlet problem for the Allen-Cahn equation in a smooth, bounded or unbounded, domain \begin{document}$Ω\subset\mathbb{R}^n.$\end{document} Under suitable assumptions, we prove an existence result and a uniform exponential estimate f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::402b6d6a6334237dd6cd98a2389d8888
https://doi.org/10.3934/dcds.2017030
https://doi.org/10.3934/dcds.2017030