<div dir="auto">Estimados, les recomiendo enfáticamente estas conferencias, el próximo viernes:</div><div dir="auto"><br></div><div dir="auto">A las 11h00 AM y a las 13h30</div><div dir="auto">hora de Uruguay</div><div dir="auto">A las 8h00 AM y a las 10h30</div><div dir="auto">hora de México</div><div dir="auto"><br></div><div dir="auto">Saludos,</div><div dir="auto"><br></div><div dir="auto">Ezequiel </div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">---------- Mensaje reenviado ---------<br>De: <strong class="gmail_sendername" dir="auto">Anna FLORIO</strong> <span dir="auto"><<a href="mailto:florio@ceremade.dauphine.fr">florio@ceremade.dauphine.fr</a>></span><br>Fecha: El mar, 31 de oct. de 2023 a la(s) 07:47<br>Asunto: One World Dynamics Seminar - 10th November - Marcel Guardia and Andrew Clarke<br>Para: Anna FLORIO <<a href="mailto:florio@ceremade.dauphine.fr">florio@ceremade.dauphine.fr</a>><br></div><br><br>




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<span style="font-size:11pt;font-family:Lato,sans-serif;margin:0px;color:rgb(0,0,0)">Dear all, </span></p>
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<span style="font-size:11pt;font-family:Lato,sans-serif;margin:0px;color:rgb(0,0,0)">The next One World Dynamics Seminar will take place on</span><span style="font-weight:700;font-size:11pt;font-family:Lato,Arial;margin:0px;color:rgb(33,33,33)"> </span><span style="font-weight:700;font-size:11pt;font-family:Lato,Arial;margin:0px;color:rgb(0,0,0)">Friday 10
 November 2023, 3pm Berlin time<span style="font-family:Lato,Arial"> </span></span><span style="font-size:11pt;font-family:Lato,sans-serif;margin:0px;color:rgb(0,0,0)">(2pm London, 9am Washington DC) -<span style="font-family:Lato,sans-serif"> </span></span><span style="font-weight:700;font-size:11pt;font-family:Lato,Arial;margin:0px;color:rgb(0,0,0)">4:30pm
 Berlin time</span><span style="font-size:11pt;font-family:Lato,sans-serif;margin:0px;color:rgb(0,0,0)"> (3:30pm London, 10:30am Washington DC)  with talks by<span style="font-family:Lato,sans-serif"> </span></span><span style="font-size:11pt;font-family:Lato,sans-serif;margin:0px;color:rgb(0,101,128)"><a href="https://web.mat.upc.edu/marcel.guardia/" rel="noopener noreferrer" id="m_6724406886614484843OWA15647d88-cc70-4cc1-0fa4-2845b26027e2" title="URL originale: https://web.mat.upc.edu/marcel.guardia/. Fare clic o toccare se si considera attendibile questo collegamento." style="margin:0px;text-decoration:none;font-family:Lato,sans-serif" target="_blank">Marcel
 Guardia</a></span><span style="font-size:11pt;font-family:Lato,sans-serif;margin:0px;color:rgb(0,0,0)"> and<span style="font-family:Lato,sans-serif"> </span></span><span style="font-size:11pt;font-family:Lato,sans-serif;margin:0px;color:rgb(0,101,128)"><a href="https://arxiv.org/search/?query=Clarke%2C+Andrew&searchtype=author&abstracts=show&order=-announced_date_first&size=50" rel="noopener noreferrer" id="m_6724406886614484843OWA589a0f93-892e-3857-95eb-eb097e8dbfe0" title="URL originale: https://arxiv.org/search/?query=Clarke%2C+Andrew&searchtype=author&abstracts=show&order=-announced_date_first&size=50. Fare clic o toccare se si considera attendibile questo collegamento." style="margin:0px;text-decoration:none;font-family:Lato,sans-serif" target="_blank">Andrew
 Clarke</a></span><span style="font-size:11pt;font-family:Lato,sans-serif;margin:0px;color:rgb(0,0,0)">.</span></p>
<ol style="font-family:"Segoe UI","Segoe UI Web (West European)","Segoe UI",-apple-system,system-ui,Roboto,"Helvetica Neue",sans-serif;font-size:15px;text-align:left;margin:6px 0px 0px;list-style-type:decimal;background-color:rgb(255,255,255);color:rgb(36,36,36)">
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<span style="margin:0px;font-family:Lato,sans-serif;color:rgb(0,101,128)"><a href="https://web.mat.upc.edu/marcel.guardia/" rel="noopener noreferrer" id="m_6724406886614484843OWA476572b7-6d44-ae46-2b96-c29533891920" title="URL originale: https://web.mat.upc.edu/marcel.guardia/. Fare clic o toccare se si considera attendibile questo collegamento." style="margin:0px;text-decoration:none;font-family:Lato,sans-serif" target="_blank">Marcel
 Guardia</a></span><span style="margin:0px;font-family:Lato,sans-serif;color:rgb(0,0,0)">, Universitat de Barcelona, Barcelona, Spain:<span style="font-family:Lato,sans-serif"> </span></span><span style="font-size:12pt;margin:0px;font-family:Lato,sans-serif;color:rgb(36,36,36)"><i style="font-family:Lato,sans-serif">Unstable
 motions in Celestial Mechanics.</i></span><span style="font-size:12pt;margin:0px;font-family:Lato,sans-serif;color:rgb(0,0,0)"><i style="font-family:Lato,sans-serif"> </i></span><span style="margin:0px;font-family:Lato,sans-serif;color:rgb(0,0,0)">3pm Berlin time (2pm London, 9am Washington
 DC). </span></p>
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<span style="margin:0px;font-family:Lato,sans-serif;color:rgb(0,0,0)">Abstract: <span style="font-family:Lato,sans-serif"> </span></span><span style="font-family:Arial;margin:0px;color:rgb(36,36,36)">One of the oldest problems in dynamical
 systems is the stability of the Solar System. That is, whether the Keplerian ellipses of planets' orbits in a planetary N-body problem undergo large long-term changes. Nowadays, it is known that the answer is rather nuanced and that stability and instability
 coexist for nearby initial conditions. In this talk I will explain how to construct unstable motions (chaos, oscillatory motions, and even Arnold diffusion) in different models in Celestial Mechanics.</span></p>
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<span style="margin:0px;font-family:Lato,sans-serif;color:rgb(0,101,128)"><a href="https://arxiv.org/search/?query=Clarke%2C+Andrew&searchtype=author&abstracts=show&order=-announced_date_first&size=50" rel="noopener noreferrer" id="m_6724406886614484843OWA2fc71bea-287d-e237-ab7f-2dc8617584bd" title="URL originale: https://arxiv.org/search/?query=Clarke%2C+Andrew&searchtype=author&abstracts=show&order=-announced_date_first&size=50. Fare clic o toccare se si considera attendibile questo collegamento." style="margin:0px;text-decoration:none;font-family:Lato,sans-serif" target="_blank">Andrew
 Clarke</a></span><span style="margin:0px;font-family:Lato,sans-serif;color:rgb(0,0,0)">, Universitat Politècnica de Catalunya, Barcelona, Spain:<span style="font-family:Lato,sans-serif"> </span></span><span style="font-size:12pt;margin:0px;font-family:Lato,sans-serif;color:rgb(0,0,0)"><i style="font-family:Lato,sans-serif">Why
 are inner planets not inclined?</i></span><span style="margin:0px;font-family:Lato,sans-serif;color:rgb(0,0,0)"> 3:45pm Berlin time (2:45pm London, 9:45am Washington DC). </span></p>
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<span style="margin:0px;font-family:Lato,sans-serif;color:rgb(0,0,0)">Abstract:  Consider the Newtonian 4-body problem, in the regime where 3 bodies (the planets) revolve on near-elliptical orbits around the other body (the sun). A long-held belief, culminating
 in the XVIII century in the first stability theorem of Laplace and Lagrange, is that the semimajor axes are stable. Assuming the initial conditions of the semimajor axes are of different orders, and that there is a large mutual inclination between planets
 1 and 2, we prove that there are orbits of the 4-body problem where the semimajor axis of planet 3 can follow any itinerary, with arbitrary precision. In addition, along such orbits, we can make the eccentricity and inclination of the orbital ellipse of planet
 2 follow any itinerary, again with arbitrary precision. For example, planet 2 may flip from prograde to retrograde nearly-horizontal revolutions. Moreover its orbital ellipse can go from near-circular to highly eccentric. This is an instance of the phenomenon
 known as<span style="font-family:Lato,sans-serif"> </span><i style="font-family:Lato,sans-serif">Arnold diffusion</i>.</span></p>
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<span style="font-size:11pt;font-family:Lato,sans-serif;margin:0px;color:rgb(0,0,0)">Zoom link and joining instructions below. More information on the OWDS can be found here <span style="font-family:Lato,sans-serif"> </span></span><span style="font-size:11pt;font-family:Lato,sans-serif;margin:0px;color:rgb(0,0,0)"><a href="https://sites.google.com/view/oneworlddynamics/home" rel="noopener noreferrer" id="m_6724406886614484843OWA716e9c14-6569-b5b2-bad1-a23e9b3990f4" title="URL originale: https://sites.google.com/view/oneworlddynamics/home. Fare clic o toccare se si considera attendibile questo collegamento." style="margin:0px;font-family:Lato,sans-serif" target="_blank">https://sites.google.com/view/oneworlddynamics/home</a></span></p>
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<span style="font-size:11pt;font-family:Arial;margin:0px">Anna, </span></div>
<div style="font-size:15px;font-family:"Segoe UI","Segoe UI Web (West European)","Segoe UI",-apple-system,system-ui,Roboto,"Helvetica Neue",sans-serif;margin:0px;background-color:rgb(255,255,255);color:rgb(36,36,36)">
<span style="font-size:11pt;font-family:Arial;margin:0px">on behalf of all the organisers</span></div>
<p style="margin:0px 0pt 0px 0px;font-family:"Segoe UI","Segoe UI Web (West European)","Segoe UI",-apple-system,system-ui,Roboto,"Helvetica Neue",sans-serif;font-size:15px;text-align:left;line-height:1.6667;padding-left:0pt;background-color:rgb(255,255,255);color:rgb(36,36,36)">
<span style="font-size:11pt;font-family:Lato,sans-serif;margin:0px;color:rgb(0,0,0)"><a href="https://sites.google.com/a/umn.edu/avery142/" rel="noopener noreferrer" id="m_6724406886614484843OWA1cac2997-9e89-ce61-5e80-e7c935c9f688" title="URL originale: https://sites.google.com/a/umn.edu/avery142/. Fare clic o toccare se si considera attendibile questo collegamento." style="margin:0px;text-decoration:none;font-family:Lato,sans-serif" target="_blank">Montie
 Avery</a>, Boston University</span></p>
<p style="margin:0px 0pt;font-family:"Segoe UI","Segoe UI Web (West European)","Segoe UI",-apple-system,system-ui,Roboto,"Helvetica Neue",sans-serif;font-size:15px;text-align:left;line-height:1.6667;padding-left:0pt;background-color:rgb(255,255,255);color:rgb(36,36,36)">
<span style="font-size:11pt;font-family:Lato,sans-serif;margin:0px;color:rgb(0,0,0)"><a href="http://people.math.gatech.edu/~ablumenthal6/" rel="noopener noreferrer" id="m_6724406886614484843OWA8c188e83-af39-600f-c508-8492efd786ba" title="URL originale: http://people.math.gatech.edu/~ablumenthal6/. Fare clic o toccare se si considera attendibile questo collegamento." style="margin:0px;text-decoration:none;font-family:Lato,sans-serif" target="_blank">Alex
 Blumenthal</a>, Georgia Tech</span></p>
<p style="margin:0px 0pt;font-family:"Segoe UI","Segoe UI Web (West European)","Segoe UI",-apple-system,system-ui,Roboto,"Helvetica Neue",sans-serif;font-size:15px;text-align:left;line-height:1.6667;padding-left:0pt;background-color:rgb(255,255,255);color:rgb(36,36,36)">
<span style="font-size:11pt;font-family:Lato,sans-serif;margin:0px;color:rgb(0,0,0)"><a href="https://sites.google.com/view/maximilian-engel/home" rel="noopener noreferrer" id="m_6724406886614484843OWAc9c19467-7c95-f2fb-73ae-c570609c9a6d" title="URL originale: https://sites.google.com/view/maximilian-engel/home. Fare clic o toccare se si considera attendibile questo collegamento." style="margin:0px;text-decoration:none;font-family:Lato,sans-serif" target="_blank">Maximilian
 Engel</a>, Freie Universität Berlin</span></p>
<p style="margin:0px 0pt;font-family:"Segoe UI","Segoe UI Web (West European)","Segoe UI",-apple-system,system-ui,Roboto,"Helvetica Neue",sans-serif;font-size:15px;text-align:left;line-height:1.6667;padding-left:0pt;background-color:rgb(255,255,255);color:rgb(36,36,36)">
<span style="font-size:11pt;font-family:Lato,sans-serif;margin:0px;color:rgb(0,0,0)"><a href="https://annafloriomath.wordpress.com/" rel="noopener noreferrer" id="m_6724406886614484843OWA1c6dd332-3500-c6dc-9821-fb992a9deacb" title="URL originale: https://annafloriomath.wordpress.com/. Fare clic o toccare se si considera attendibile questo collegamento." style="margin:0px;text-decoration:none;font-family:Lato,sans-serif" target="_blank">Anna
 Florio</a>, Université Paris Dauphine-PSL</span></p>
<p style="margin:0px 0pt;font-family:"Segoe UI","Segoe UI Web (West European)","Segoe UI",-apple-system,system-ui,Roboto,"Helvetica Neue",sans-serif;font-size:15px;text-align:left;line-height:1.6667;padding-left:0pt;background-color:rgb(255,255,255);color:rgb(36,36,36)">
<span style="font-size:11pt;font-family:Lato,sans-serif;margin:0px;color:rgb(0,0,0)"><a href="https://www.macs.hw.ac.uk/~mo3/" rel="noopener noreferrer" id="m_6724406886614484843OWA57e114c5-d408-ecd3-83af-16d09140d5e1" title="URL originale: https://www.macs.hw.ac.uk/~mo3/. Fare clic o toccare se si considera attendibile questo collegamento." style="margin:0px;text-decoration:none;font-family:Lato,sans-serif" target="_blank">Michela
 Ottobre</a>, Heriot-Watt University</span></p>
<p style="margin:0px 0pt;font-family:"Segoe UI","Segoe UI Web (West European)","Segoe UI",-apple-system,system-ui,Roboto,"Helvetica Neue",sans-serif;font-size:15px;text-align:left;line-height:1.6667;padding-left:0pt;background-color:rgb(255,255,255);color:rgb(36,36,36)">
<span style="font-size:11pt;font-family:Lato,sans-serif;margin:0px;color:rgb(0,0,0)"><a href="https://www.math.u-bordeaux.fr/~jraissy/" rel="noopener noreferrer" id="m_6724406886614484843OWA4c411a61-c4da-52b5-ee3e-f358aec3d480" title="URL originale: https://www.math.u-bordeaux.fr/~jraissy/. Fare clic o toccare se si considera attendibile questo collegamento." style="margin:0px;text-decoration:none;font-family:Lato,sans-serif" target="_blank">Jasmin
 Raissy</a>, Université de Bordeaux</span></p>
<p style="margin:0px 0pt;font-family:"Segoe UI","Segoe UI Web (West European)","Segoe UI",-apple-system,system-ui,Roboto,"Helvetica Neue",sans-serif;font-size:15px;text-align:left;line-height:1.6667;padding-left:0pt;background-color:rgb(255,255,255);color:rgb(36,36,36)">
<span style="font-size:11pt;font-family:Lato,sans-serif;margin:0px;color:rgb(0,0,0)"><a href="https://sites.google.com/view/mtanzi/" rel="noopener noreferrer" id="m_6724406886614484843OWAa46b0d5a-f041-95a8-9230-4733d171d3c0" title="URL originale: https://sites.google.com/view/mtanzi/. Fare clic o toccare se si considera attendibile questo collegamento." style="margin:0px;text-decoration:none;font-family:Lato,sans-serif" target="_blank">Matteo
 Tanzi</a>, <span style="font-variant-ligatures:none;text-align:start;font-family:Lato,sans-serif;display:inline!important;color:rgb(33,33,33)">
King's College London</span></span></p>
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<span style="margin:0px;font-family:Roboto,Arial;color:rgb(0,0,0)">Zoom link :<span style="font-family:Roboto,Arial"> </span></span><span style="font-size:11.5pt;margin:0px;font-family:Roboto,Arial;color:rgb(0,0,0)"><a href="https://gatech.zoom.us/j/92713473429?pwd=Yk9vWllaNjVrNDV4UnVWbVZiL1JFQT09" target="_blank" style="font-family:Roboto,Arial">https://gatech.zoom.us/j/92713473429?pwd=Yk9vWllaNjVrNDV4UnVWbVZiL1JFQT09</a></span></p>
<p style="margin:12px 0px 0px 15pt;line-height:1.6667;padding-left:0pt;font-family:Roboto,Arial"><span style="margin:0px;font-family:Roboto,Arial">Meeting ID:<span style="font-family:Roboto,Arial"> </span></span><span style="font-size:11.5pt;margin:0px;font-family:Roboto,Arial;color:rgb(97,96,116)">927
 1347 3429</span></p>
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<span style="margin:0px;font-family:Roboto,Arial">Passcode:<span style="font-family:Roboto,Arial"> </span></span><span style="font-size:11.5pt;margin:0px;font-family:Roboto,Arial">OWDS</span></p>
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