Seminar Day - UB-UPC DSG
đź“Ť Where: Aula S04, Facultat de MatemĂ tiques i EstadĂstica, UPC. Pau Gargallo,14 BCN.
đź“… When: 16:00, 17th September
🧑‍🏫 Who: Przemysław Berk, Nikolaus Copernicus University in Toruń, Poland
đź“” Title: Disjointness of rescalings of surface flows.
Abstract: We consider certain classes of flows on compact surfaces such as locally Hamiltonian or translation flows, and we are investigating the relation of these flows with their rescalings, that is, their linear accelerations. I will show that in certain well parametrized classes of such flows, a typical one is disjoint (spectrally or in the sense of Furstenberg) with its rescalings (rational or real, depending on the class), i.e. it is non-isomorphic to an extreme degree. This talk is based on an article with Adam Kanigowski and an ongoing project with Corinna Ulcigrai.
To prove some conjectures worth 1 million dollars, others just 10 martinis. You can read the history of the ten martini’s conjecture in this nice article in QuantaMagazine. Our colleague @joaquimpuig took an important role in this history.
Check it out here: https://www.quantamagazine.org/ten-martini-proof-uses-number-theory-to-explain-quantum-fractals-20250825/?mc_cid=ccc8fc25c1&mc_eid=8923fdee67
Our Colleague J.J. Masdemont will share his knowledge on libration points in the Breakwell Lecture in the Astrodynamics Symposium of the International Astronautical Congress held in Sidney from September 29th to October 3rd.
Title: Libration point orbits: a brief journey through fundamental dynamics and applications.
Time: October 1st, 10:15 AEST
Place: International Convention Centre Sydney, Room C4.8, Sydney Australia
Some of our papers published last year that we missed:
On the boundedness of solutions of a forced discontinuous oscillator now in Journal of differential equations from our colleagues T. MartĂnez-Seara and J. Villanueva and their collaborators L. Ferreira.
Check it out here to learn more:https://www.sciencedirect.com/science/article/abs/pii/S0022039624005266
A dynamical study of Hilda asteroids in the Circular and Elliptic RTBP now in Chaos (Woodbury, N.Y.) from our colleagues O. RodrĂguez and his collaborators A. Jorba and B. Nicolás.
Check it out here to learn more: https://pubs.aip.org/aip/cha/article/34/12/123116/3323588/A-dynamical-study-of-Hilda-asteroids-in-the
A numerical study of the scattering in the He-Cu model with a Morse potential: parabolic manifolds and exponentially small phenomena now in Communications in nonlinear science and numerical simulation from our colleagues E. BarrabĂ©s, P. MartĂn and M. OllĂ© and their collaborators F. Borondo and E Fontich.
Check it out here to learn more:https://www.sciencedirect.com/science/article/pii/S1007570424004453
Symmetric comet-type periodic orbits in the elliptic three-dimensional restricted (N+1)-body problem now in Physica. D, Nonlinear phenomena from our colleagues J.M. Cors and his collaborators M. Garrido.
Check it out here to learn more:https://www.sciencedirect.com/science/article/pii/S0167278924003762
Convex symmetric rectangular pentagon central configurations now in Communications in nonlinear science and numerical simulation from our colleagues J.M. Cors and his collaborators M. Alvarez and J. Lino.
Check it out here to learn more:https://upcommons.upc.edu/entities/publication/9b6a3a7a-735f-4611-8f16-0b8e800692b6
Summer mode de-activated!
🔋 Our Batteries are full-powered! 🔋
We start this new course with a research day on non-linear dynamics and turbulent flows.
RESEARCH DAY: NONLINEAR DYNAMICS AND FLUIDS
Date: Wednesday, September 3
Location: Room S04, FME-UPC
Program:
10:00 – 11:00 — Seminar: Jacopo Riboldi (ETH Zürich)
Spectra of Rossby waves and their connection to weather and extreme events
11:00 – 13:00 — Short talks
Everyone is welcome to give a short and informal presentation about their research to encourage collaboration. If you would like to contribute, please send me an email at (jezabel.curbelo@upc.edu).
15:00 – 16:00 — Short talks / Discussion and collaboration time
16:00 – 17:00 — Dynamical Systems Seminar UB-UPC: Kathrin Padberg-Gehle (Leuphana Universität Lüneburg)
From trajectories to transport: network-based approaches for coherent sets and scalar mixing in turbulent flows
See you there!
Summer mode activated! 🌞
While our minds never stop working on research, this account will be taking a break in August.
We’ll be back with more updates in September. Enjoy the summer!
Last Thursday July 17th our colleague Victor Mañosa presented our Research group at the Research Day of the Math Department at the Universitat Politècnica de Catalunya!
We keep doing research!
This week two of our young members defends their PhD. Here you may found the more details:
14/07, 10h (sala actes FME)
PhD Candidate: JosĂ© Lamas RodrĂguez
Title: Oscillatory motions, parabolic orbits and collision orbits in the planar circular restricted three-body problem
Directors: Tere MartĂnez-Seara, Marcel Guardia
15/07, 12h (Sala de Graus EPSEB)
PhD Candidate: Roman Moreno González
Title: The role of resonances in Arnold diffusion
Directors: Inmaculada Baldomá, Tere MartĂnez-Seara
The conference season is open!
Our group is represented in several conferences and meetings.
This week you can found us in:
JISD: https://www.crm.cat/jisd2025/
WRF: https://www.workrootfind.uji.es/
See you there!
From 10 June to 12 June several of our members have attended to the DDays meeting https://www.dance-net.org/dday/40 organized by the DANCE network.
Our collegue A. Delshams give a talk on A reduction method for invariant curves of quasi-periodically forced maps.
We keep doing and explaining science!
Explicit numerical computation of normal forms for Poincaré maps, now in Communications in Nonlinear Science and Numerical Simulation from our colleague M. Jorba-Cuscó and his collaborators J. Gimeno, A. Jorba and M. Zou.
This publication is dedicated to the memory of A. Jorba.
Check it out here to learn more:
https://www.sciencedirect.com/science/article/pii/S1007570425003247
Polynomial normal forms for ODEs near a center-saddle equilibrium point, now in Journal of Differential Equations from our colleague A. Delshams and his collaborator P. Zgliczyński.
Check it out here to learn more:
https://www.sciencedirect.com/science/article/abs/pii/S0022039625002955?via%3Dihub
On the Arnold diffusion mechanism in Medium Earth Orbit, now in Journal of Nonlinear Science from our colleague M. Guardia and I. BaldomĂ and their collaborators E.M. Alessi and M. Giralt.
Check it out here to learn more:
https://link.springer.com/article/10.1007/s00332-024-10080-0
On Nested Central Configurations of the 3n Body Problem, now in Nonlinear Science from our colleague J.M. Cors and his collaborators E. Barrabés, A. C. Fernandes and C. Vidal.
Check it out here to learn more:
https://link.springer.com/article/10.1007/s00332-025-10162-7
Oscillatory Motions, Parabolic Orbits and Collision Orbits in the Planar Circular Restricted Three-Body Problem, now in Communications in Mathematical Physics from our colleagues José Lamas, Marcel Guardia and Tere M. Seara
Check it out here to learn more
https://link.springer.com/article/10.1007/s00220-025-05283-9
The IMTECH Newslater is live.
You can find there two enlightening interviews to our colleagues T. Guillemon and V. Mañosa.
Also J. Curbelo presented a very nice outreach article about fluid Dynamics.
You can find it: https://imtech.webs.upc.edu/2025/01/01/newsletter-07-january-december-2024/
ARGO Float Data Analysis Using a Generalized Spectral Clustering Method from our colleague J. Curbelo and her coworker I. Rypina.
Check it out here to learn more: https://meetingorganizer.copernicus.org/EGU25/EGU25-7732.html