<div dir="ltr"><div id="gmail-:s1" class="gmail-Ar gmail-Au gmail-Ao" style="display:block"><div id="gmail-:rx" class="gmail-Am gmail-aiL gmail-Al editable gmail-LW-avf gmail-tS-tW gmail-tS-tY" aria-label="Corpo del messaggio" role="textbox" aria-multiline="true" style="direction:ltr;min-height:241px" tabindex="1" aria-controls=":uc" aria-expanded="false">Dear all,<div dir="auto"><br></div><div dir="auto">We remind you <b>today</b>'s<b> </b>appointment of the series of seminars "Insalate di Matematica".</div><div dir="auto">Here are the details:</div><div dir="auto"><br></div><div dir="auto"><u>Speaker</u>: <i>Matteo Tarocchi</i> (Università degli Studi di Milano-Bicocca)<br></div><div dir="auto"><br></div><div dir="auto"><div dir="auto"><span style="color:rgb(0,0,0)"><u>Date and time</u>: <b>9th of May 2024, 4:30 pm (CET)</b></span></div></div><div dir="auto"><br></div><div dir="auto"><div dir="auto"><font color="#000000"><u>Title</u>: <span style="background-color:rgb(255,229,153)">"</span></font><font color="#000000"><span style="background-color:rgb(255,229,153)">Groups acting on fractals and graph approximations</span></font><font color="#000000"><span style="background-color:rgb(255,229,153)"></span></font><font color="#000000"><span style="background-color:rgb(255,229,153)">"</span></font></div><br></div><div dir="auto"><div dir="auto"><font color="#000000"><u>Abstract</u>:</font> This talk is about rearrangement groups: a family of groups of certain
homeomorphisms of fractals that permute finitely many self-similar
pieces. Homeomorphism groups of fractals are often uncountable
topological groups, which are difficult to study algebraically.
Rearrangement groups, while only being countable, are often rich enough
to be dense in the homeomorphism groups of the fractals on which they
act, yet they are manageable enough that algorithmic problems on them
are treatable, and they have plenty of interesting algebraic properties
of their own. Since this talk is aimed at a general audience and deals
with an intersection of topology, algebra and computation, it will
focus on a general description of rearrangements and, as an application,
show how to tackle their conjugacy problem</div><div dir="auto"><br></div><div dir="auto"><div dir="auto"><font color="#000000"><u>Keywords:</u></font> homeomorphism groups, self-similar fractals, decision problems</div><div dir="auto"><br></div><div dir="auto"><div dir="auto"><u><b>Information to attend in room 3014</b></u></div><div dir="auto">The seminar will take place in room 3014, at the building U5-Ratio, Università degli Studi di Milano Bicocca.</div><div dir="auto"><br></div><div dir="auto"></div><div dir="auto"><u><b>Information to attend online<br></b></u></div><div dir="auto"><div dir="auto"><span dir="auto" tabindex="0" aria-label="Copied: https://unimib.webex.com/unimib/j.php?MTID=mbda2ef40f5c8008497021940ceb3b143" role="button" title="https://unimib.webex.com/unimib/j.php?MTID=mbda2ef40f5c8008497021940ceb3b143" class="gmail-auto-select"><a href="https://unimib.webex.com/unimib/j.php?MTID=mbda2ef40f5c8008497021940ceb3b143">https://unimib.webex.com/unimib/j.php?MTID=mbda2ef40f5c8008497021940ceb3b143</a> </span>(password: insalate, 46725283 from phones)</div><a href="https://unimib.webex.com/unimib/j.php?MTID=m3c536ba5a33f71bb9d6a3bc9b00992ad" target="_blank"></a></div><div dir="auto"><div id="m_4557729034515253286m_1557104255583827781m_-4439392858642327092m_5555831848437307896gmail-:183" style="direction:ltr;margin:8px 0px 0px;padding:0px;font-size:0.875rem;font-family:"Google Sans",Roboto,RobotoDraft,Helvetica,Arial,sans-serif"><div id="m_4557729034515253286m_1557104255583827781m_-4439392858642327092m_5555831848437307896gmail-:17t" style="font-variant-numeric:normal;font-variant-east-asian:normal;font-variant-alternates:normal;font-kerning:auto;font-feature-settings:normal;font-stretch:normal;font-size:small;line-height:1.5;font-family:Arial,Helvetica,sans-serif;overflow:hidden"><div dir="ltr"><div dir="auto"><div dir="auto"><div dir="auto"><div dir="auto"><br></div><div dir="auto">For further information, please visit our website: <a href="https://sites.google.com/view/insalate-di-matematica" rel="noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer" target="_blank">https://sites.google.com/view/insalate-di-matematica</a> or contact us at <a href="mailto:insalate.matematica@unimib.it" rel="noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer" target="_blank">insalate.matematica@unimib.it</a>. Find us also on our Instagram page: <a href="https://www.instagram.com/insalate_di_matematica22/" rel="noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer" target="_blank">https://www.instagram.com/insalate_di_matematica23/</a></div><div dir="auto"><br></div><div dir="auto"><div dir="auto"><font color="#000000">The organizers: Ettore Marmo, Simone Gallivanone, Fabio Mastrogiacomo, Marco Fusari, Tommaso Toti and Matteo Tarocchi.</font></div></div></div></div></div></div><div></div><div></div><div><br><br></div></div></div></div></div></div></div></div></div></div>