DynamIST

A seminar in dynamical systems at IST Austria.

NEW! We are organizing a summer school in dynamical systems in September in Strobl, Austria, whose registration is open until June 1st. Please refer to the webpage for more information.

IST Austria is also hosting some sessions of the BudWiSer – The Budapest-Vienna Dynamics Seminar. For more details see the webpage of the University of Budapest or the webpage of the University of Vienna.

UPCOMING TALKS – SPTRING 2025

DateTimeSpeakerAffiliationTitle Room
January 21, 202514:15Olga BernardiUniversity of PadovaStudying symplectic billiards: an overview and recent rigidity results
Heinzel Seminar Room
January 28, 202514:15Corentin FierobeUniversity of Rome Tor VergataDiamond structures in KAM invariant curves of analytic billiard-like mapsHeinzel Seminar Room
Feburary 4, 202514:15Gil BorCIMATFour cusps of caustics by reflection
Heinzel Seminar Room
Feburary 11, 202514:15Dongchen LiImperial College LondonSymplectic blenders near whiskered tori and persistence of saddle-center homoclinicsHeinzel Seminar Room
Feburary 18, 202514:15Adi DicksteinTel Aviv UniversitySymplectic vs. topological quasi-statesHeinzel Seminar Room
February 25, 202514:15Sébastien BieblerUniversité Paris CitéNon-density of hyperbolicity in complex dynamics in several variablesHeinzel Seminar Room
March 4, 202514:15Yunzhe LiISTASimultaneous preservation of Lyapunov exponents within analytic families of standard maps
Heinzel Seminar Room
March 11, 202514:15Mauricio PolettiUniversidade Federal do CearáMeasures of maximal entropy for non-uniformly hyperbolic mapsHeinzel Seminar Room
March 18, 202514:15Michael EntovTechnion – Israel Institue of TechnologyApplications of filtered Legendrian contact homology to contact dynamics
Heinzel Seminar Room
March 25, 202514:15Eran Igra
Valerii Sopin		SIMIS – Shanghai Institute for Mathematics and Interdisciplinary SciencesPeriod-Doubling Cascades Invariants
Heinzel Seminar Room
April 1,
2025		14:15Dario BambusiUniversità degli studi di MilanoNon relativistic limit of quasiperiodic solutions of the Klein Gordon equation
Heinzel Seminar Room
April 8,
2025		14:15Piotr OprochaAGH University of KrakowOn paramrtrized BBM technique and planar attractorsHeinzel Seminar Room
April 11, 202514:15Yaofeng SuUniversity of Rome Tor VergataStatistic properties of open dynamical systemsBME, Budapest
BudWiSer15:30Felipe ArbuluJules Verne University, AmiensSpectral analysis of some classes of S-adic subshiftsBME, Budapest
17:00Illya KovalISTAMushroom KAM theoryBME, Budapest
April 23, 2025
(adjusted)		15:30Jacopo De Simoi University of TorontoLocal Marked Spectral Determination for ℤ₂-symmetric planar
billiards close to the disk		Moonstone, Seminar Room F
April 29, 202514:15Benoît GrébertUniversité de NantesAlmost global existence for Hamiltonian PDEs on compact manifoldsHeinzel Seminar Room
May 6,
2025		14:30Umberto Leone HryniewiczRWTH Aachen UniversityProof of Hofer–Wysocki–Zehnder’s two or infinity conjectureMoonstone, Seminar Room E
16:00Miguel GarridoUniversitat Autònoma de BarcelonaParabolic saddles and Newhouse domains in Celestial MechanicsMoonstone, Seminar Room E
May 16, 202514:00Maik GrögerJagiellonian University, KrakowContinuity of Folner averagesMoonstone, Seminar Room G
BudWiSer15:30Yunzhe LiISTADeformational spectral rigidity of Liouville metricsMoonstone, Seminar Room G
17:00Yakov Pesin Pennsylvania State University, State CollegeEssential Coexistence Phenomenon in Hamiltonian DynamicsMoonstone, Seminar Room G
May 20,
2025		14:30Marco MazzucchelliENS LyonFrom curve shortening to flat link stability and Birkhoff sections of geodesic flowsMoonstone, Seminar Room E
16:00Andreas VollmerUniversität HamburgA geometric approach to second-order superintegrable systems
Moonstone, Seminar Room E

PAST TALKS – FALL 2024

DateTimeSpeakerAffiliationTitle Room
Spetember 27, 202414:15Caiyun MaBME, HUN-REN Stochastics Research GroupDimensions of projected sets and measures on typical self-affine setsErdős center, Budapest
BudWiSer15:30Elzbieta KrawczykJagiellonian University, KrakowAmorphic complexity, tameness, and nullness of substitution shiftsErdős center, Budapest
17:00Daniel TsodikovichISTALocally maximizing orbits for billiardsErdős center, Budapest
October 8, 202414:15Susanna Terracini University of TurinExpanding solutions to the N-body problemHeinzel Seminar Room
October 15, 202414:15Rafaël PotrieCentro de Matemática Universidad de la República, UruguayTopology and dynamics of partially hyperbolic diffeomorphisms in dimension 3Central Bldg, Mondi 1
October 18, 2024
(expository talk)		14:15Daniel TsodikovichISTAIntegrable geodesic flows on the torusHeinzel Seminar Room
October 22, 202414:15Anna FlorioUniversité Paris Dauphine-PSLGenericity of transverse homoclinic points for analytic convex billiardsHeinzel Seminar Room
November 5, 202414:15Marcelo R. R. AlvesUniversity of AntwerpFrom curve shortening to flat link stability and Birkhoff sections of geodesic flows
Heinzel Seminar Room
November 12, 202414:15Stefano MarmiScuola Normale Superiore di PisaE pluribus unum: natural boundaries and uniqueness in small divisor problemsHeinzel Seminar Room
November 19, 202414:15Silvius KleinPontifical Catholic University of Rio de JaneiroLarge deviations estimates for certain skew-product dynamical systemsHeinzel Seminar Room
November 26, 202414:15Malo JézéquelCNRS, LMBA-BrestZeta functions for smooth pseudo-Anosov flowsHeinzel Seminar Room
December 3, 202414:15Xianghui ShiPeking UniversityErgodic theory of expanding Thurston maps and their subsystemsMoonstone, Seminar Room E
15:30Otto Vaughn OstermanUniversity of MarylandElliptic Periodic Orbits in the Planar Circular Restricted 3-Body ProblemMoonstone, Seminar Room E
December 10, 202414:15Michael YampolskyUniversity of TorontoFrom renormalization of diffeomorphisms to critical circle maps and Herman rings of two-dimensional mapsHeinzel Seminar Room
December 17, 202414:15Jérôme BuzziCNRS, Laboratoire de Mathématiques d’OrsayMeasures maximizing the entropy for discretized Anosov flowsCentral Bldg, Mondi 3

PAST TALKS – SPRING 2024

DateTimeSpeakerAffiliationTitleRoom
January 12, 202414:15Edmond KoudjinanISTAOn the Birkhoff conjecture for nearly centrally symmetric domainsUniversity of Vienna
BudWiSer15:30István Kolossváry Rényi InstituteAssouad spectrum of planar carpetsUniversity of Vienna
17:00Serge TroubetzkoyAix-Marseille UniversityOn the complexity of polygonal billiardsUniversity of Vienna
February
13, 2024		14:00Yuri BakhtinNew York UniversityErgodic theory of the stochastic Burgers equationMoonstone Bdg, Seminar Room E
15:30Davide RavottiUniversität WienAbelian covers of some translation flowsMoonstone Bdg, Seminar Room E
February
27, 2024		14:00Mathieu HelfterUniversité Paris CitéEvery diffeomorphism is a total renormalization of a close to identity mapMoonstone Bdg, Seminar Room E
15:30Adam ŚpiewakInstitute of Mathematics Polish Academy of SciencesTime-delayed embeddings of dynamical systems with
self-intersections – a probabilistic approach		Moonstone Bdg, Seminar Room E
March 12,
2024		14:00Qiaoling WeiCapital Normal UniversityDivergence of geometric normalization for an elliptic fixed point in the planeMoonstone Bdg, Seminar Room E
15:30Illya KovalInstitute of Science and Technology AustriaBilliard tables with analytic Birkhoff normal form are generically Gevrey divergentMoonstone Bdg, Seminar Room E
March 26,
2024		14:00Maciej P. WojtkowskiUniversity of Arizona, TucsonNew results about old sequencesMoonstone Bdg, Seminar Room E
15:30Gabriele BenedettiVrije Universiteit AmsterdamPeriodic magnetic flows on the two-torusMoonstone Bdg, Seminar Room E
April 9,
2024		14:00Martin LeguilÉcole PolytechniqueBirkhoff attractors of dissipative billiardsMoonstone Bdg, Seminar Room E
15:30Alexander GorodnikUniversität ZürichDistribution and quantitative density of orbitsMoonstone Bdg, Seminar Room E
May 3,
2024		14:15Károly SimonBudapest University of Technology and EconomicsRandomly perturbed 
self-similar sets		University of Vienna
April
BudWiSer		15:30
Illya Koval
Institute of Science and Technology AustriaBilliard problems with analytic Birkhoff normal are generically Gevrey divergentUniversity of Vienna
17:00Jacques FejozUniversity Paris DauphineOn the instability of the planetary problemUniversity of Vienna
May 6, 2024
Institute Colloquium		11:30Leonid PolterovichTel Aviv UniversityOscillations and topologyRaiffeisen Lecture Hall
May 7,
2024		14:00Leonid PolterovichTel Aviv UniversityTales of symplectic mapsMoonstone Bdg, Seminar Room E
15:30Jacques FejozUniversity Paris DauphineOn invariant submanifolds of conform symplectic dynamicsMoonstone Bdg, Seminar Room E
May 16, 2024
(exceptional session)		16:00Adam KanigowskiUniversity of MarylandSparse equidistribution problems in dynamical systemsHeinzel Seminar Room
May 17, 202414:15Nándor SimányiUniversity of Alabama at BirminghamWojtkowski’s ergodic hypothesis: a conjecture for decades?Central Bldg, Mondi 3
BudWiSer15:30Klaudiusz CzudekIST AustriaRandom walks in quasiperiodic environmentCentral Bldg, Mondi 3
17:00Adam KanigowskiUniversity of MarylandChaotic properties of smooth dynamical systemsCentral Bldg, Mondi 3
May 21,
2024		14:00Cagri SertUniversität ZürichStationary probability measures on projective spacesMoonstone Bdg, Seminar Room E
15:30Otto Vaughn OstermanUniversity of MarylandElliptic Islands in the Planar Circular Restricted 3-Body ProblemMoonstone Bdg, Seminar Room E
June 4,
2024		14:00Kristian BjerklövKTH Royal Institute of TechnologyMonotone families of circle diffeomorphisms driven by expanding
circle maps		Moonstone Bdg, Seminar Room E
15:30Maria SaprykinaKTH Royal Institute of TechnologyNonconmutative coboundary equations over integrable dynamicsMoonstone Bdg, Seminar Room E
June 18,
2024		Summer SchoolStability and rigidity in dynamical systems, beyond classical KAM theory
July 12, 202414:15Otto Vaugh OstermanUniversity of MarylandElliptic Islands in the Planar Circular Restricted 3-Body ProblemUniversity of Vienna
BudWiSer15:30Olena Karpel AGH KrakowTail invariant measures for generalized Bratteli diagramsUniversity of Vienna
17:00Michael Baake BielefeldOn the long-range order enforced by Hats, CAPs and SpectresUniversity of Vienna
July 15, 2024
(exceptional session)		11:00Jianlu ZhangChinese Academy of SciencesSelection principle of generalized Hamilton-Jacobi equationsHeinzel Seminar Room

PAST TALKS – FALL 2023

DateTimeSpeakerAffiliationTitleRoom
September 12, 202314:30Liviana PalmisanoKTH Royal Institute of TechnologyAttractors and their stabilityHeinzel Seminar Room
16:00Jialun LiÉcole PolytechniqueOn the dimension of limit sets on the real projective plane via stationary measuresHeinzel Seminar Room
September 26, 202314:30Yaron OstroverTel Aviv UniversityA Symplectic Perspective on Minkowski Billiard DynamicsMoonstone Bdg, Seminar Room E
–––––
October 5, 2023
(exceptional session)		16:30Manfred EinsiedlerETH ZürichMeasure Rigidity for forms of SL(2,R)^kHeinzel Seminar Room
October 10, 202314:30Abed BounemouraParis Dauphine UniversitySmall divisors problems in non quasi-analytic classesMoonstone Bdg, Seminar Room E
16:00Corentin FierobeIST AustriaOnly quadrics have pseudo-causticsMoonstone Bdg, Seminar Room E
Budapest-Vienna Seminar14:00Kostyantin DrachUniversitat de BarcelonaLyapunov spectral rigidity of expanding circle mapsMoonstone Bdg, Seminar Room E
October 20, 202315:15Alex RutarUniversity of St. AndrewMultifractal analysis of non-conformal measuresMoonstone Bdg, Seminar Room E
16:45Ilya KovalIST AustriaThe singular support of the wave trace and the length spectrum are often non-equal near ellipsesMoonstone Bdg, Seminar Room E
October 24, 202314:30François LedrappierUniversity of Notre DameDimension of limit sets for Anosov representations.Moonstone Bdg, Seminar Room E
16:00Alberto AbbondandoloRuhr-Universität Bochum Symplectic capacities of convex bodies and geodesics in the space of contact formsMoonstone Bdg, Seminar Room E
November 6, 202316:00Ke ZhangUniversity of TorontoOn the formally linearizable billiard of TreschevMoonstone Bdg, Seminar Room E
17:30Tomás LázaroUniversitat Politècnica de CatalunyaLong transients in Ecology, two theoretical examplesMoonstone Bdg, Seminar Room E
November 21, 2023WorkshopMathematical billiardsAt the crossroads of dynamics, geometry, analysis, and mathematical physicsSimons Center, Stony Brook
December 05, 202314:30Daniel TsodikovichTel Aviv UniversityBilliard analogue of Blaschke-Santalo inequalityMoonstone Bdg, Seminar Room E
16:00Anna ZdunikUniversity of WarsawRandom complex dynamicsMoonstone Bdg, Seminar Room E
December 19, 202314:30Omri SarigWeizmann Institute of ScienceRobustness of the measure of maximal entropy for smooth surface diffeomorphismsMoonstone Bdg, Seminar Room E
16:00Jonguk YangUniversity of ZürichRenormalization of Unicritical Diffeomorphisms of the DiskMoonstone Bdg, Seminar Room E

PAST TALKS – SPRING 2023

DateTimeSpeakerAffilitationTitleRoom
January 13, 202314:00Corentin FierobeISTAFrom diamonds to length spectrum rigidityHeinzel Seminar Room
BudWiSer seminar15:00Peter Imre TothBME BudapestTypicality of finite complexity in planar dispersing billiardsHeinzel Seminar Room
16:30Michael BaakeUniversity of BielefeldOn some dynamical systems of number-theoretic originHeinzel Seminar Room
January 31, 202314:00Corinna UlcigraiUniversity of ZurichLinearization and rigidity in higher genusHeinzel Seminar Room
15:30Yi PanISTAReducibility of quasi-periodic cocycles valued in symplectic groupsHeinzel Seminar Room
February 14, 202314:00Krzysztof FrączekNicolaus Copernicus University in ToruńDeviation spectrum of ergodic integrals for locally Hamiltonian flows on surfacesHeinzel Seminar Room
15:30Joscha HenheikISTADeformational rigidity of integrable metrics on the torusHeinzel Seminar Room
February 28, 202314:00Livia CorsiUniversità degli Studi Roma TreInfinite dimensional invariant tori for the one dimensional NLS EquationHeinzel Seminar Room
15:30Otto Vaughn OstermanUniversity of MarylandOn Length Spectrum Rigidity in Dispersing Billiard SystemsHeinzel Seminar Room
March 14, 202314:00Michela ProcesiUniversità degli Studi Roma TreReducibility and nonlinear stability for an NLS equation on T^2Heinzel Seminar Room
15:30Daniel GalliUniversity of BolognaRuelle-Policott resonances and speed of mixing of Anosov diffeomorphismsHeinzel Seminar Room
March 23, 202314:00Eva MirandaUniversitat Politècnica de CatalunyaFrom Reeb dynamics to fluid computers: two faces of a mirrorHeinzel Seminar Room
15:30Albert FathiGeorgia Institute of TechnologyWeak KAM theory on metric spacesHeinzel Seminar Room
April 25, 202314:00Daniel Peralta-SalasICMATHamiltonian dynamics of Gaussian random potentialsHeinzel Seminar Room
15:30Dierk SchleicherAix-Marseille University, CNRSDynamical systems and finding roots of polynomialsHeinzel Seminar Room
May 9, 202313:00Sebastian Van StrienImperial College LondonA survey on some recent developments in 1D dynamicsHeinzel Seminar Room
14:30Jean-Pierre MarcoUniversité Pierre et Marie CurieRecent results on the sources of the polynomial entropyHeinzel Seminar Room
May 23, 2023WorkshopSymplectic Dynamics
June 06, 202314:00Giovanni ForniUniversity of MarylandWeakly mixing billiards in polygons Heinzel Seminar Room
15:30Ian MelbourneUniversity of WarwickDecay of correlations for geodesic flows on nonpositively curved surfacesHeinzel Seminar Room
June 20, 202314:00Richard Evan SchwartzBrown University5-point energy minimizationHeinzel Seminar Room
15:30Zhiyuan ZhangParis Sorbonne UniversityNewhouse phenomenon in the complex Hénon familyHeinzel Seminar Room

PAST TALKS – FALL 2022

DateTimeRoomSpeakerAffiliationTitle and abstract
September 27, 202210:00 amHeinzel Seminar RoomNúria FagellaUniversity of Barcelona and CRMStructural stability in complex dynamics
1:00 pmHeinzel Seminar RoomTere M-SearaUniversitat Politècnica de CatalunyaAbout the non-existence of small
breathers in Klein-Gordon equations
October 10, 2022
ISTA Colloquium		11:30 amRaiffeisen Lecture HallArtur AvilaUniversity of Zurich–
October 11, 20222:00 pmHeinzel Seminar RoomSylvain CrovisierUniversité Paris-SaclayExistence of physical measures
for surface diffeomorphisms
3:30 pm–––
October 25, 20222:00 pmHeinzel Seminar RoomMark PollicottUniversity of WarwickEstimates on Hausdorff dimension and Lyapunov exponents and their applications.
3:30 pmHeinzel Seminar RoomArtem DudkoInstitute of Mathematics, Polish Academy of SciencesOn Hausdorff dimension of Julia sets
via a computer-assisted proof
November 8, 20222:00 pmHeinzel Seminar RoomKlaus SchmidtUniversity of ViennaHomoclinic points in higher rank ergodic theory
3:15 pmHeinzel Seminar RoomKlaudiusz CzudekISTARandom dynamics on the circle and interval
November 22, 20222:00 pmHeinzel Seminar RoomAnton ZorichInstitute of Mathematics of JussieuRandom square-tiled surfaces of large genus and random multicurves on surfaces of large genus.
3:30 pmHeinzel Seminar RoomAndrey MironovSobolev Institute of MathematicsIntegrable magnetic geodesic flows on 2-torus.
December 06, 20222:00 pmHeinzel Seminar RoomPascal HubertAix-Marseille UniversityInterval exchange transformations conjugated to rotations-
3:30 pmHeinzel Seminar RoomAndrew ClarkeUniversity of BarcelonaWhy are inner planets not inclined?
December 20, 20222:00 pmHeinzel Seminar RoomMaciej CapińskiAGH University of Science and TechnologyCovering relations, cone conditions and blenders
3:30 pmHeinzel Seminar RoomPierre BergerParis Sorbonne UniversityAnalytic pseudo-rotations

PAST TALKS – SPRING 2022

DateTimeRoomSpeakerAffiliationTitle and abstract
February 28, 20222:00 pmMondi 2Carlangelo LiveraniUniversity of Roma Tor VergataFast-Slow partially hyperbolic systems
3:30 pmMondi 2Henk BruinUniversity of ViennaOn volume preserving almost Anosov flows
March 14, 20222:00 pmMondi 2Alfonso SorrentinoUniversity of Rome Tor VergataOn the persistence of periodic tori for symplectic twist maps
3:30 pmMondi 2Diana DavisPhillips Exeter AcademyPeriodic paths on regular polygons
March 28, 20222:00 pmMondi 2Dmitry TuraevImperial College LondonStable motion of highly energetic particles
interacting via a repelling potential
3:30 pmMondi 2Corentin FierobeInstitute of Science and Technology AustriaOn projective billiards with open sets of periodic orbits
April 11, 20222:00 pmMondi 2Maxime ZavidoviqueInstitut de Mathématiques de JussieuWeak KAM solutions of conservative
Twist maps of the annulus
3:15 pmMondi 2Marcel Guardia MunarrizUniversitat Politècnica de CatalunyaOscillatory motions and symbolic dynamics
in the three body problem
April 25, 20222:00 pmMondi 2Peter BalintBudapest University of Technology and EconomicsPeriodic Lorentz gas with small scatterers
3:15 pmMondi 2Davide RavottiUniversity of ViennaLarge hyperbolic circles
May 9, 20222:00 pmMondi 2Amir VigInstitute of Science and Technology AustriaThe Wave Trace and Birkhoff Billiards
3:30 pmMondi 2Raphaël KrikorianCY Cergy Paris UniversityBirkhoff Normal Forms, frequency maps
and local integrability.
May 23, 20222:00 pmMondi 2Edmond KoudjinanInstitute of Science and Technology AustriaOn non-coexistence of 2- & 3-rational caustics
in nearly circular billiard tables
3:30 pmMondi 2Misha BialyTel Aviv UniversityThe non-standard generating function
of Birkhoff billiards and applications
June 8, 20222:00 pmMondi 3Illya KovalInstitute of Science and Technology AustriaDomains which are integrable close to the boundary
and close to the circular ones are ellipses
3:30 pmMondi 3Frank TrujilloUniversity of ZurichPersistence of lower dimensional invariant tori
for near-integrable Hamiltonians
June 20, 2022ConferenceFinite Dimensional Integrable Systems in
 Geometry and Mathematical Physics