BEGIN:VCALENDAR
VERSION:2.0
PRODID:researchseminars.org
CALSCALE:GREGORIAN
X-WR-CALNAME:researchseminars.org
BEGIN:VEVENT
SUMMARY:Ciprian Manolescu (Stanford University)
DTSTART:20241127T133000Z
DTEND:20241127T150000Z
DTSTAMP:20260422T212828Z
UID:GT_IPM/1
DESCRIPTION:Title: G
eneralizations of Rasmussen’s invariant\nby Ciprian Manolescu (Stanf
ord University) as part of IPM Geometry and Topology Seminar\n\n\nAbstract
\nOver the last 20 years\, the Rasmussen invariant of knots in S^3 has had
a number of interesting applications to questions about surfaces in B^4.
In this talk I will survey some recent extensions of the invariant to knot
s in other three-manifolds: in connected sums of S^1 x S^2 (joint work wit
h Marengon\, Sarkar\, and Willis)\, in RP^3 (joint work with Willis\, and
also separate work of Chen)\, and in a general setting (work by Morrison\,
Walker and Wedrich\; and independently by Ren-Willis). I will describe ho
w these invariants give bounds on the genus of smooth surfaces in 4-manifo
lds\, and can even detect exotic 4-manifolds with boundary.\n\nhttps://www
.zoom.us/join\nMeeting ID: 935 6306 2335\nPasscode: 304145\n
LOCATION:https://researchseminars.org/talk/GT_IPM/1/
END:VEVENT
BEGIN:VEVENT
SUMMARY:William Hide (Oxford University)
DTSTART:20241204T120000Z
DTEND:20241204T133000Z
DTSTAMP:20260422T212828Z
UID:GT_IPM/2
DESCRIPTION:Title: S
mall eigenvalues of hyperbolic surfaces\nby William Hide (Oxford Unive
rsity) as part of IPM Geometry and Topology Seminar\n\n\nAbstract\nWe stud
y the spectrum of the Laplacian on finite-area hyperbolic surfaces of larg
e volume\, focusing on small eigenvalues i.e. those below 1/4. I will disc
uss some recent results and open problems in this area. \nBased on joint w
orks with Michael Magee and with Joe Thomas.\n\nhttps://www.zoom.us/join\n
Meeting ID: 819 4967 6990\nPasscode: 362880\n
LOCATION:https://researchseminars.org/talk/GT_IPM/2/
END:VEVENT
END:VCALENDAR