<div dir="ltr">Hi everyone,<div><br></div><div>A quick reminder that Thomas Brazelton's talk is today, and the colloquium is after that!</div><div><br></div><div>Both the speaker and I will not be able to come to lunch today, so there won't be an official lunch, but feel free to gather with other topologists at the usual time.</div><div><br></div><div>See you at the talk!</div><div><br></div><div>Cary</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Oct 31, 2022 at 12:13 PM Cary Malkiewich <<a href="mailto:malkiewich@math.binghamton.edu">malkiewich@math.binghamton.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>Hi everyone,</div><div><br></div><div>This week we are pleased to have Thomas Braelton (Penn) speaking about enumerative geometry in the presence of a group action. This will be an <b>in person talk</b>, on Thursday at 2:50pm in WH 100E.</div><div><br>We will meet at noon outside WH100E to take the speaker to lunch. See you there!</div><div><br>Remember we will also have a colloquium by Avy Soffer, after Thomas's talk (and cookies!) are over.<br><br>Best,<br>Cary and Roman<br></div><div><br>%%%%%%%%%%%%%%%%%%%%%%%%%%%%</div><div><div>Title: Equivariant enumerative geometry</div><div>Abstract: Classical enumerative geometry asks geometric questions of the form "how many?" and expects an integral answer. For example, how many circles can we draw tangent to a given three? How many lines lie on a cubic surface? The fact that these answers are well-defined integers, independent upon the initial parameters of the problem, is Schubert’s principle of conservation of number. In this talk we will outline a program of "equivariant enumerative geometry", which wields equivariant homotopy theory to explore enumerative questions in the presence of symmetry. Our main result is equivariant conservation of number, which states roughly that the sum of regular representations of the orbits of solutions to an equivariant enumerative problem are conserved.</div></div></div>
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