BEGIN:VCALENDAR VERSION:2.0 PRODID:-//91 Calendar - ECPv6.15.20//NONSGML v1.0//EN CALSCALE:GREGORIAN METHOD:PUBLISH X-WR-CALNAME:91 Calendar X-ORIGINAL-URL:/calendar X-WR-CALDESC:Events for 91 Calendar REFRESH-INTERVAL;VALUE=DURATION:PT1H X-Robots-Tag:noindex X-PUBLISHED-TTL:PT1H BEGIN:VTIMEZONE TZID:America/New_York BEGIN:DAYLIGHT TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:EDT DTSTART:20250309T070000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0400 TZOFFSETTO:-0500 TZNAME:EST DTSTART:20251102T060000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:EDT DTSTART:20260308T070000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0400 TZOFFSETTO:-0500 TZNAME:EST DTSTART:20261101T060000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:EDT DTSTART:20270314T070000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0400 TZOFFSETTO:-0500 TZNAME:EST DTSTART:20271107T060000 END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTART;TZID=America/New_York:20260401T150000 DTEND;TZID=America/New_York:20260401T160000 DTSTAMP:20260519T210619 CREATED:20260326T180346Z LAST-MODIFIED:20260331T181250Z UID:10007129-1775055600-1775059200@umaine.edu SUMMARY:Mathematics Colloquium - Dynamics on Character Varieties over Finite Fields DESCRIPTION:Speaker: Cigole Thomas\, Bates College \nAbstract: Character varieties arise as spaces that parametrize group homomorphisms from a finitely presented group Γ into an “nice” algebraic group G\, up to a natural notion of equivalence. In this talk\, we explore these spaces by studying their points over finite fields Fq and examining how symmetries of the group Γ\, encoded by its outer automorphism group Out(Γ)\, act on them.\nWe introduce a natural stratification of the space and count the number of points in each stratum\, using these counts to gain insight into the asymptotic behavior (when q goes to ∞) of the action as the size of the field grows. In particular\, we consider the case where Γ = Zr and G = SL3(C). \nThe talk will be self-contained and aimed at a broad audience\, with the necessary background developed along the way. URL:/calendar/event/mathematics-colloquium-dynamics-on-character-varieties-over-finite-fields/ LOCATION:Hill Auditorium\, Barrows Hall\, 91\, Orono\, ME\, 04469\, United States CATEGORIES:Lectures & Seminars ORGANIZER;CN="Department of Mathematics & Statistics":MAILTO:mathstats@maine.edu GEO:44.8922637;-68.6714486 X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Hill Auditorium Barrows Hall 91 Orono ME 04469 United States;X-APPLE-RADIUS=500;X-TITLE=Barrows Hall\, 91:geo:-68.6714486,44.8922637 END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/New_York:20260408T150000 DTEND;TZID=America/New_York:20260408T160000 DTSTAMP:20260519T210619 CREATED:20260331T182200Z LAST-MODIFIED:20260331T182200Z UID:10007938-1775660400-1775664000@umaine.edu SUMMARY:Mathematics Colloquium - Some geometric inequalities for convex hypersurfaces DESCRIPTION:MAT Colloquium\nWednesday\, April 8\, 2026\nHill Auditorium\, Barrows Hall\nRefreshments at 3:00pm\, Talk 3:15-4:05pm \nSpeaker: James Dibble\, University of Southern Maine \nAbstract: A classical family of problems in differential geometry involves bounding certain geometric quantities\, such as volume or the length of the shortest closed geodesic\, in terms of others. In this talk\, we will discuss a variety of such inequalities\, including new ones for convex hypersurfaces. The focus will be on results that can be stated without making reference to how quickly a space curves. This is joint work with Joseph Hoisington. URL:/calendar/event/mathematics-colloquium-some-geometric-inequalities-for-convex-hypersurfaces/ LOCATION:Barrows Hall\, 91\, Orono\, ME\, 04469\, United States CATEGORIES:Lectures & Seminars,Student Activities ORGANIZER;CN="Department of Mathematics & Statistics":MAILTO:mathstats@maine.edu GEO:44.897732;-68.6687076 X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Barrows Hall 91 Orono ME 04469 United States;X-APPLE-RADIUS=500;X-TITLE=91:geo:-68.6687076,44.897732 END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/New_York:20260415T150000 DTEND;TZID=America/New_York:20260415T160000 DTSTAMP:20260519T210619 CREATED:20260403T170808Z LAST-MODIFIED:20260409T132251Z UID:10007953-1776265200-1776268800@umaine.edu SUMMARY:Mathematics Colloquium — Vector vs. Scalar Sup Norms DESCRIPTION:MAT Colloquium\nWednesday\, April 15\, 2026\nHill Auditorium\, Barrows Hall\nRefreshments at 3:00pm\, Talk 3:15-4:05pm \nSpeaker: Jack Buttcane\, 91 \nAbstract: \nRotations in three dimensions depend on three angles\, which we call the Euler angles. A function of the Euler angles can be expressed in terms of Wigner-D matrices\, which are representations of the rotation group SO(3). These matrix functions are strongly tied to quantum mechanics where they measure the probability of a state transition under a rotation\, but as a number theorist\, I am interested in their connection to automorphic forms: Suppose we have a vector-valued function of the 3×3 invertible matrices that transforms by a Wigner-D matrix under rotations. Then an interesting quantity to study is the “sup norm” sup_A ||f(A)||\, i.e. the maximum value of the length of the vector f(A) over 3×3 invertible matrices A. \nWe can also think of the function f as a vector of scalar-valued functions f=(f_{-d}\,…f_d) and for each entry f_j in the vector\, we can consider sup_A |f_j(A)|. The question I want to consider is\, to what extent does the ratio of these two sup norms depend exclusively on the Wigner-D matrix\, independent of the particular function f? As an undergraduate summer research project Andrii Obertas did some computations on this project and I’ll report on the outcome of those\, as well. URL:/calendar/event/mathematics-colloquium/ LOCATION:Barrows Hall\, 91\, Orono\, ME\, 04469\, United States CATEGORIES:Lectures & Seminars ORGANIZER;CN="Department of Mathematics & Statistics":MAILTO:mathstats@maine.edu GEO:44.897732;-68.6687076 X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Barrows Hall 91 Orono ME 04469 United States;X-APPLE-RADIUS=500;X-TITLE=91:geo:-68.6687076,44.897732 END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/New_York:20260420T150000 DTEND;TZID=America/New_York:20260420T160000 DTSTAMP:20260519T210619 CREATED:20260403T171242Z LAST-MODIFIED:20260403T171242Z UID:10007957-1776697200-1776700800@umaine.edu SUMMARY:Thesis Defense: Samuel Chistolini DESCRIPTION:Samuel Chistolini\, a candidate for the Master of Arts in Mathematics will be defending his thesis on Monday\, April 20\, 2026 at 3:00pm in Neville 421. \nMore information to come. URL:/calendar/event/thesis-defense-samuel-chistolini/ LOCATION:Neville Hall\, 91\, Orono\, ME\, 04469\, United States CATEGORIES:Lectures & Seminars ORGANIZER;CN="Department of Mathematics & Statistics":MAILTO:mathstats@maine.edu GEO:44.897732;-68.6687076 X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Neville Hall 91 Orono ME 04469 United States;X-APPLE-RADIUS=500;X-TITLE=91:geo:-68.6687076,44.897732 END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/New_York:20260429T150000 DTEND;TZID=America/New_York:20260429T160000 DTSTAMP:20260519T210619 CREATED:20260403T171413Z LAST-MODIFIED:20260403T171413Z UID:10007959-1777474800-1777478400@umaine.edu SUMMARY:Math Awards Ceremony DESCRIPTION:The Department of Mathematics and Statistics will be honoring Math Majors along with recognizing graduating Undergraduate and Graduate program students to wrap up another school year. The event will take place on Wednesday\, April 29\, 2026 at 3:00pm in Hill Auditorium in Barrows Hall. Refreshments will be provided for the event. URL:/calendar/event/math-awards-ceremony/ LOCATION:Barrows Hall\, 91\, Orono\, ME\, 04469\, United States CATEGORIES:Student Activities ORGANIZER;CN="Department of Mathematics & Statistics":MAILTO:mathstats@maine.edu GEO:44.897732;-68.6687076 X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Barrows Hall 91 Orono ME 04469 United States;X-APPLE-RADIUS=500;X-TITLE=91:geo:-68.6687076,44.897732 END:VEVENT END:VCALENDAR