BEGIN:VCALENDAR
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BEGIN:VEVENT
SUMMARY:Andrew Sageman-Furnas (University Göttingen)
DTSTART;VALUE=DATE-TIME:20200421T170000Z
DTEND;VALUE=DATE-TIME:20200421T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/1
DESCRIPTION:Title: Navigating the space of Chebyshev nets\nby Andrew Sagem
an-Furnas (University Göttingen) as part of Online seminar geometric anal
ysis\n\n\nAbstract\nMany materials are built from a grid of flexible but n
early inextensible rods that behaves as a shell-like structure. Everyday e
xamples range from fabrics made of 1000s of interwoven yarns\; to kitchen
strainers made of 100s of plastically deforming wires\; to architectural g
ridshells or medical stents made of 10s of elastically deforming rods. In
this talk\, I emphasize the geometric constraints common to these differen
t physical systems. We build from a differential geometric model for woven
fabric\, initially introduced by Pafnuty Chebyshev in 1878\, that directl
y encodes the inextensibility of the two families of rods.\n\nWe discuss t
he theory of Chebyshev nets through a series of applied\, collaborative ef
forts in computational fabrication and inverse design. Theoretical obstruc
tions expose the challenges in finding Chebyshev nets on surfaces with lar
ge amounts of curvature\, suggesting a limited shape space. However\, we s
how that a careful reformulation of the problem\, combined with a discrete
analog of Chebyshev nets\, leads to computational tools that reveal a vib
rant design space.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Siran Li (Rice University)
DTSTART;VALUE=DATE-TIME:20200421T180000Z
DTEND;VALUE=DATE-TIME:20200421T190000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/2
DESCRIPTION:Title: Isometric Immersions of Riemannian Manifolds into Eucli
dean Spaces\, Revisited\nby Siran Li (Rice University) as part of Online s
eminar geometric analysis\n\n\nAbstract\nThe existence of isometric immers
ions of Riemannian\nmanifolds into ambient Euclidean spaces has been a cla
ssical problem\nin geometric analysis and nonlinear PDEs. Seminal works by
Darboux\,\nWeyl\, Nirenberg\, Nash\, Gromov\, etc. etc. have addressed th
is problem\nfrom different perspectives. In this talk we discuss three app
roaches\,\nsome are probably less known\, to the isometric immersions prob
lem.\nThese include (1)\, pseudo-holomorphic curve formulation of the Weyl
\nproblem due to F. Labourie\; (2)\, Uhlenbeck gauge formulation for the\n
Pfaff system\; and (3)\, the fluid mechanical formulation for negatively\n
curved surfaces.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Bastian Käfer (RWTH Aachen)
DTSTART;VALUE=DATE-TIME:20200428T170000Z
DTEND;VALUE=DATE-TIME:20200428T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/3
DESCRIPTION:Title: A Möbius invariant energy for sets of arbitrary dimens
ion and codimension\nby Bastian Käfer (RWTH Aachen) as part of Online sem
inar geometric analysis\n\n\nAbstract\nWe consider the family of Möbius i
nvariant energies for m-dimensional submanifolds of $\\mathbb R^n$\, intro
duced by R. Kusner and J. Sullivan\, defined on a class of sets\, which ar
e given by the union of Lipschitz graphs and satisfy an additional conditi
on of "nice" self-intersection.\nWe show for these sets that finite energy
implies Reifenberg-flatness through estimating the energy of certain subs
ets.\nThis finally leads to a local representation given by a single graph
and prevents any kind of self-intersection.\nAs an immediate implication\
, we obtain that every immersed $C^1$ manifold with finite energy is embed
ded.\nThis is joint work with Heiko von der Mosel.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Huy The Nguyen (Queen Mary University London)
DTSTART;VALUE=DATE-TIME:20200505T170000Z
DTEND;VALUE=DATE-TIME:20200505T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/4
DESCRIPTION:Title: High codimension mean curvature flow and surgery\nby Hu
y The Nguyen (Queen Mary University London) as part of Online seminar geom
etric analysis\n\nAbstract: TBA\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Jesse Ratzkin (University Würzburg)
DTSTART;VALUE=DATE-TIME:20200512T170000Z
DTEND;VALUE=DATE-TIME:20200512T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/5
DESCRIPTION:Title: On constant Q-curvature metrics with isolated singulari
ties and a related fourth order conformal invariant\nby Jesse Ratzkin (Uni
versity Würzburg) as part of Online seminar geometric analysis\n\n\nAbstr
act\nThe Q-curvature of a Riemannian manifold is a higher order analog of
its scalar curvature\, and so many people have over the last two decades p
roven results about Q-curvature mirroring theorems about scalar curvature.
I will present two such results. First\, I will describe a refined asympt
otic expansion of isolated singularities in the conformally flat case\, si
milar to work of Caffarelli\, Gidas and Spruck in the scalar curvature set
ting. Then I will describe a conformal invariant and prove a convergence r
esult similar to a theorem of Schoen.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Volker Branding (University Vienna)
DTSTART;VALUE=DATE-TIME:20200519T170000Z
DTEND;VALUE=DATE-TIME:20200519T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/6
DESCRIPTION:Title: Higher order generalizations of harmonic maps\nby Volke
r Branding (University Vienna) as part of Online seminar geometric analysi
s\n\nAbstract: TBA\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Katharina Brazda (University Vienna)
DTSTART;VALUE=DATE-TIME:20200526T170000Z
DTEND;VALUE=DATE-TIME:20200526T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/7
DESCRIPTION:Title: The Canham-Helfrich model for multiphase biomembranes\n
by Katharina Brazda (University Vienna) as part of Online seminar geometri
c analysis\n\n\nAbstract\nBiological membranes adopt a fascinating variety
of shapes. The Canham-Helfrich variational model describes their equilibr
ium configurations as surfaces of minimal elastic bending energy under are
a and volume constraints. In case of heterogeneous membranes with multiple
phases\, lateral fluidity gives rise to an additional coupling between co
mposition and curvature. We present an existence result for multiphase Can
ham-Helfrich minimizers with sharp phase interfaces obtained in the framew
ork of oriented curvature varifolds with boundary. This is joint work with
Luca Lussardi and Ulisse Stefanelli.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Miles Simon (University Magdeburg)
DTSTART;VALUE=DATE-TIME:20200623T170000Z
DTEND;VALUE=DATE-TIME:20200623T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/8
DESCRIPTION:Title: On the regularity of Ricci flows coming out of metric s
paces.\nby Miles Simon (University Magdeburg) as part of Online seminar ge
ometric analysis\n\n\nAbstract\nJoint work with Alix Deruelle\, Felix Schu
lze\n\nWe consider solutions to Ricci flow defined on manifolds M for a ti
me interval $(0\,T)$ whose Ricci curvature is bounded uniformly in time fr
om below\, and for which the norm of the full curvature tensor at time $t
$ is bounded by $c/t$ for some fixed constant $c>1$ for all $t \\in (0\,T
)$.\nFrom previous works\, it is known that if the solution is complete fo
r all times $t>0$\, then there is a limit\nmetric space $(M\,d_0)$\, as ti
me t approaches zero. We show : if there is a open region $V$ on which $(V
\,d_0)$ is *smooth*\, then the\nsolution can be extended smoothly to time
zero on $V$.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Elena Mäder-Baumdicker (University Darmstadt)
DTSTART;VALUE=DATE-TIME:20200505T180000Z
DTEND;VALUE=DATE-TIME:20200505T190000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/9
DESCRIPTION:Title: The Morse index of Willmore spheres and its relation to
the geometry of minimal surfaces\nby Elena Mäder-Baumdicker (University
Darmstadt) as part of Online seminar geometric analysis\n\nAbstract: TBA\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Remy Rodiac (University Paris-Saclay)
DTSTART;VALUE=DATE-TIME:20200407T170000Z
DTEND;VALUE=DATE-TIME:20200407T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/11
DESCRIPTION:Title: Inner variations and limiting vorticities for the Ginzb
urg-Landau equations\nby Remy Rodiac (University Paris-Saclay) as part of
Online seminar geometric analysis\n\nAbstract: TBA\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Daniel Steenebrügge (RWTH Aachen)
DTSTART;VALUE=DATE-TIME:20200414T170000Z
DTEND;VALUE=DATE-TIME:20200414T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/12
DESCRIPTION:Title: A speed preserving Hilbert gradient flow for generalize
d integral Menger curvature\nby Daniel Steenebrügge (RWTH Aachen) as part
of Online seminar geometric analysis\n\nAbstract: TBA\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Marc Pegon (Université de Paris)
DTSTART;VALUE=DATE-TIME:20200616T170000Z
DTEND;VALUE=DATE-TIME:20200616T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/13
DESCRIPTION:Title: Partial regularity for fractional harmonic maps into sp
heres\nby Marc Pegon (Université de Paris) as part of Online seminar geom
etric analysis\n\n\nAbstract\nSimilarly to “classical” harmonic maps\,
which are critical points of the Dirichlet energy\, fractional harmonic m
aps are defined as critical points of a fractional Dirichlet energy associ
ated with the $s$-power of the Laplacian\, for $s \\in (0\,1)$.\nIn this t
alk\, after a brief reminder on classical harmonic maps\, I will present t
he fractional setting and the partial regularity results we have obtained
for maps valued into a sphere. In the case of half harmonic maps ($s=\\fra
c{1}{2}$)\, I will also recall the connection with minimal surfaces with f
ree boundary\, which allowed us to improve known regularity results for en
ergy minimizing maps into spheres.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Peter Topping (University of Warwick)
DTSTART;VALUE=DATE-TIME:20200630T170000Z
DTEND;VALUE=DATE-TIME:20200630T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/14
DESCRIPTION:Title: Uniqueness of limits in geometric flows\nby Peter Toppi
ng (University of Warwick) as part of Online seminar geometric analysis\n\
n\nAbstract\nQuite often when considering long-time behaviour of geometric
flows\, or considering blow-ups of singularities in geometric PDE\, we ex
tract limits using soft compactness arguments. For example\, a flow might
easily be seen to converge to a limit at a *sequence* of times converging
to infinity.\nThe more subtle question is then whether the flow converges
as time converges to infinity\, without having to restrict to a sequence o
f times.\n\nI will outline some of the issues that arise in this subject\,
focussing on gradient flows for the harmonic map energy\, and sketch some
recent work with M.Rupflin and J.Kohout.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ruben Jakob (Technion)
DTSTART;VALUE=DATE-TIME:20200707T170000Z
DTEND;VALUE=DATE-TIME:20200707T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/15
DESCRIPTION:Title: Generic full smooth convergence of the elastic energy f
low in the 2-sphere\nby Ruben Jakob (Technion) as part of Online seminar g
eometric analysis\n\n\nAbstract\nThe speaker is going to present his recen
t investigation of the ``Moebius\ninvariant Willmore flow'' (MIWF) in the
3-sphere and of some particular version of the\n``elastic energy flow'' (E
EF) in the 2-sphere. We will discuss the\ninteraction between these two ge
ometric flows via the Hopf fibration and the\nresulting possibility to tra
nsfer particular insights about the ``EEF'' to\nthe ``MIWF''\, and vice ve
rsa special insights about the ``MIWF'' back\nto the ``EEF''. A big motiva
tion for this parallel investigation is the\nannounced proof (by the speak
er) of the ''generic full smooth convergence''\nof the ``EEF'' in the 2-sp
here.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Myfanwy Evans (University of Potsdam)
DTSTART;VALUE=DATE-TIME:20200616T180000Z
DTEND;VALUE=DATE-TIME:20200616T190000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/16
DESCRIPTION:Title: Geometric modelling of tangled structures\nby Myfanwy E
vans (University of Potsdam) as part of Online seminar geometric analysis\
n\n\nAbstract\nThis talk will introduce the use of geometric ideas in the
characterisation and analysis of tangled biophysical systems. It will intr
oduce the construction of idealised tangled structures using ideas of both
symmetry and homotopy of tangled lines on surfaces. These structures prov
ide an extensive set of tangling motifs for the exploration of the behavio
ur of tangled microstructures in liquids\, and I will show preliminary res
ults working towards this goal\, including an example of the geometry-driv
en swelling of human skin cells.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Lynn Heller (University of Hannover)
DTSTART;VALUE=DATE-TIME:20200602T170000Z
DTEND;VALUE=DATE-TIME:20200602T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/17
DESCRIPTION:Title: Area Estimates for High genus Lawson surfaces via DPW\n
by Lynn Heller (University of Hannover) as part of Online seminar geometri
c analysis\n\n\nAbstract\nStarting at a saddle tower surface\, we give a n
ew existence proof of the Lawson surfaces\n$\\xi_{m\,k}$ of high genus by
dropping some closing conditions of the surface and then\ndeforming the co
rresponding DPW potential. As a byproduct\, we obtain for fixed mestimates
\non the area of $\\xi_{m\,k}$ in terms of their genus $g= mk \\gg 1$. Thi
s is joint work with\nSebastian Heller and Martin Traizet.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Sven Pistre (RWTH Aachen University)
DTSTART;VALUE=DATE-TIME:20200609T170000Z
DTEND;VALUE=DATE-TIME:20200609T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/18
DESCRIPTION:Title: The Radon transform and higher regularity of surfaces m
inimising a Finsler area\nby Sven Pistre (RWTH Aachen University) as part
of Online seminar geometric analysis\n\n\nAbstract\nA Finsler metric is a
smooth family of smooth norms on the tangent bundle of a manifold. One pos
sible generalisation of the usual Riemannian notion of area in Finsler geo
metry is the Busemann-Hausdorff area functional. In this talk I will consi
der high-codimensional disk-type surfaces which minimise this area with re
spect to Plateau boundary conditions. $\\\\$\nI will show that the Buseman
n-Hausdorff area functional fits into the Hildebrandt-von der Mosel framew
ork on Cartan functionals. Existence of minimisers is then guaranteed unde
r mild growth conditions of the Finsler metric. Higher regularity ($W^{2\,
2}_{\\textrm{loc}} \\cap C^{1\,\\mu}$) of minimisers can be achieved by us
ing functional analytic properties of the Radon transform. \n$\\\\$\nThe l
atter is an operator which assigns a function on the $(n−1)$-sphere its
mean by integration over $(m-1)$-dimensional subspheres. One crucial prope
rty of this operator is its equivariance with respect to a Lie group actio
n on the sphere and the $m$-Grassmannian. An infinitesimal version of this
equivariance yields the regularity results about area minimisers.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Christian Bär (University of Potsdam)
DTSTART;VALUE=DATE-TIME:20200714T170000Z
DTEND;VALUE=DATE-TIME:20200714T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/19
DESCRIPTION:Title: Counter-intuitive approximations\nby Christian Bär (Un
iversity of Potsdam) as part of Online seminar geometric analysis\n\n\nAbs
tract\nThe Nash-Kuiper embedding theorem is a prototypical example of a co
unter-intuitive approximation result: any short embedding of a Riemannian
manifold into Euclidean space can be approximated by *isometric* ones. As
a consequence\, any surface can be isometrically $C^1$-embedded into an ar
bitrarily small ball in $\\mathbb{R}^3$. For $C^2$-embeddings this is impo
ssible due to curvature restrictions.\n\nWe will present a general result
which will allow for approximations by functions satisfying strongly overd
etermined equations on open dense subsets. This will be illustrated by thr
ee examples: real functions\, embeddings of surfaces\, and abstract Rieman
nian metrics on manifolds.\n\nOur method is based on "weak flexibility"\,
a concept introduced by Gromov in 1986. This is joint work with Bernhard H
anke (Augsburg).\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Carla Cederbaum (University of Tübingen)
DTSTART;VALUE=DATE-TIME:20200721T170000Z
DTEND;VALUE=DATE-TIME:20200721T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/20
DESCRIPTION:Title: On CMC-foliations of asymptotically flat manifolds\nby
Carla Cederbaum (University of Tübingen) as part of Online seminar geomet
ric analysis\n\n\nAbstract\nIn 1996\, Huisken and Yau proved existence of
foliations by constant mean curvature (CMC) surfaces in the asymptotic end
of an asymptotically Euclidean Riemannian manifold. Their work has inspir
ed the study of various other foliations in asymptotic ends\, most notably
the foliations by Willmore surfaces (Lamm\, Metzger\, Schulze) and by con
stant expansion/null mean curvature surfaces in the context of asymptotica
lly Euclidean initial data sets in General Relativity (Metzger). I will pr
esent a new foliation by constant spacetime mean curvature surfaces (STCMC
)\, also in the context of asymptotically Euclidean initial data sets in G
eneral Relativity (joint work with Sakovich). The STCMC-foliation is well-
suited to define a notion of total center of mass in General Relativity.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Nadine Große
DTSTART;VALUE=DATE-TIME:20200728T170000Z
DTEND;VALUE=DATE-TIME:20200728T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/21
DESCRIPTION:Title: Boundary value problems on singular domains: an approac
h via bounded geometries\nby Nadine Große as part of Online seminar geome
tric analysis\n\n\nAbstract\nIn this talk\, we consider boundary value pro
blems on domains \nwith non smooth boundaries. We approach this problem by
transferring it\nto non-compact manifolds with a suffiently nice geometry
-- the bounded geometry.\nThis gives a more general framework that allows
to handle Dirichlet (or\nDirichlet-Neumann mixed) boundary value problems
for domains with a\nlarger class of singularities on the boundary and giv
es a nice geometric\ninterpretation. This is joint work with Bernd Ammann\
n(Regensburg) and Victor Nistor (Metz).\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Melanie Rupflin (University of Oxford)
DTSTART;VALUE=DATE-TIME:20200804T170000Z
DTEND;VALUE=DATE-TIME:20200804T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/22
DESCRIPTION:Title: Łojasiewicz inequalities near simple bubble trees for
the $H$ surface equation\nby Melanie Rupflin (University of Oxford) as par
t of Online seminar geometric analysis\n\n\nAbstract\nIn this talk we disc
uss a gap phenomenon for critical points of\nthe $H$-functional on closed
non-spherical surfaces when $H$ is constant\, and in\nthis setting further
more prove that sequences of almost critical points\nsatisfy Łojasiewicz
inequalities as they approach the first non-trivial\nbubble tree.\n\nTo pr
ove these results we derive sufficient conditions for Łojasiewicz\ninequa
lities to hold near a finite-dimensional submanifold of\nalmost-critical p
oints for suitable functionals on a Hilbert space.\n\nThe presented result
s are joint work with Andrea Malchiodi and Ben Sharp.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Julian Scheuer (Cardiff University)
DTSTART;VALUE=DATE-TIME:20200811T170000Z
DTEND;VALUE=DATE-TIME:20200811T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/23
DESCRIPTION:Title: Concavity of solutions to elliptic equations on the sph
ere\nby Julian Scheuer (Cardiff University) as part of Online seminar geom
etric analysis\n\n\nAbstract\nAn important question in PDE is when a solut
ion to an elliptic\nequation is concave. This has been of interest with re
spect to the spectrum of\nlinear equations as well as in nonlinear problem
s. An old technique going back\nto works of Korevaar\, Kennington and Kawo
hl is to study a certain two-point\nfunction on a Euclidean domain to prov
e a so-called concavity maximum principle\nwith the help of a first and se
cond derivative test. To our knowledge\, so far\nthis technique has never
been transferred to other ambient spaces\, as the\nnonlinearity of a gener
al ambient space introduces geometric terms into the\nclassical calculatio
n\, which in general do not carry a sign. In this talk we\nhave a look at
this situation on the unit sphere. We prove a concavity maximum\nprinciple
for a broad class of degenerate elliptic equations via a careful\nanalysi
s of the spherical Jacobi fields and their derivatives. In turn we obtain\
nconcavity of solutions to this class of equations. This is joint work wit
h Mat\nLangford\, University of Tennessee Knoxville.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Richard Bamler
DTSTART;VALUE=DATE-TIME:20200818T170000Z
DTEND;VALUE=DATE-TIME:20200818T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/24
DESCRIPTION:by Richard Bamler as part of Online seminar geometric analysis
\n\nAbstract: TBA\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Max Engelstein
DTSTART;VALUE=DATE-TIME:20200825T170000Z
DTEND;VALUE=DATE-TIME:20200825T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/25
DESCRIPTION:Title: Winding for Wave Maps\nby Max Engelstein as part of Onl
ine seminar geometric analysis\n\n\nAbstract\nWave maps are harmonic maps
from a Lorentzian domain to a\nRiemannian target. Like solutions to many e
nergy critical PDE\, wave maps can\ndevelop singularities where the energy
concentrates on arbitrary small\nscales but the norm stays bounded. Zoomi
ng in on these singularities yields\na harmonic map (called a soliton or b
ubble) in the weak limit. One\nfundamental question is whether this weak l
imit is unique\, that is to say\,\nwhether different bubbles may appear as
the limit of different sequences of\nrescalings.\n\nWe show by example th
at uniqueness may not hold if the target manifold is\nnot analytic. Our
construction is heavily inspired by Peter Topping's\nanalogous example of
a ``winding" bubble in harmonic map heat flow. However\,\nthe Hamiltonian
nature of the wave maps will occasionally necessitate\ndifferent arguments
. This is joint work with Dana Mendelson (U Chicago).\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Peter McGrath (North Carolina State University)
DTSTART;VALUE=DATE-TIME:20200901T170000Z
DTEND;VALUE=DATE-TIME:20200901T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/26
DESCRIPTION:Title: Quantitative Isoperimetric Inequalities on Riemannian S
urfaces\nby Peter McGrath (North Carolina State University) as part of Onl
ine seminar geometric analysis\n\n\nAbstract\nTalk Abstract: In this talk
\, we introduce a scattering asymmetry which measures the asymmetry of a d
omain by quantifying its incompatibility with an isometric circle action.
We prove a quantitative isoperimetric inequality involving the scattering
asymmetry and characterize the domains with vanishing scattering asymmetr
y by their rotational symmetry. We also give a new proof of the sharp Sob
olev inequality for Riemannian surfaces which is independent of the isoper
imetric inequality. This is joint work with J. Hoisington.\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:Ryan Alvarado (Amherst College)
DTSTART;VALUE=DATE-TIME:20200908T170000Z
DTEND;VALUE=DATE-TIME:20200908T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/27
DESCRIPTION:by Ryan Alvarado (Amherst College) as part of Online seminar g
eometric analysis\n\nAbstract: TBA\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:(reserved)
DTSTART;VALUE=DATE-TIME:20200915T170000Z
DTEND;VALUE=DATE-TIME:20200915T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/28
DESCRIPTION:by (reserved) as part of Online seminar geometric analysis\n\n
Abstract: TBA\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:(reserved)
DTSTART;VALUE=DATE-TIME:20200922T170000Z
DTEND;VALUE=DATE-TIME:20200922T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/29
DESCRIPTION:by (reserved) as part of Online seminar geometric analysis\n\n
Abstract: TBA\n
END:VEVENT
BEGIN:VEVENT
SUMMARY:(reserved)
DTSTART;VALUE=DATE-TIME:20200929T170000Z
DTEND;VALUE=DATE-TIME:20200929T180000Z
DTSTAMP;VALUE=DATE-TIME:20200812T040838Z
UID:OSGA/30
DESCRIPTION:by (reserved) as part of Online seminar geometric analysis\n\n
Abstract: TBA\n
END:VEVENT
END:VCALENDAR