BEGIN:VCALENDAR
VERSION:2.0
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PRODID:-//Mathematics Department//NONSGML mathical.php//EN
X-WR-CALNAME:Mathematics Department
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a0013@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210330T145000
DTEND;TZID=America/New_York:20210330T153000
CATEGORIES:Algebra and Number Theory Seminar
SUMMARY:Grant Molnar: Absurd equalities and Runge's method: the
degenerate case
DESCRIPTION:In this talk\, we present an overly involved proof that
for every integer $d > 2$\, the if $x$ and $y$ are integers such
that $x^d - x = y^d - y$\, then $x = y$ or $|x|\, |y| \\leq 1$.
LOCATION:Meeting ID: 939 1193 8570\, Passcode: 876807
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a0075@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210401T150000
CATEGORIES:Math Colloquium
SUMMARY:Daniel Velleman: Paradoxical Games and the Axiom of Choice
DESCRIPTION:Alice and Bob are playing a guessing game. A room
contains infinitely many boxes\, labeled with the positive integers.
Each box contains a real number. Alice will go into the room\,
open some but not all boxes\, and then guess the contents of an
unopened box. Then she leaves\, the boxes are closed\, and Bob
enters\, opens some but not all boxes\, and guesses the contents of
an unopened box. Alice and Bob can plan their strategies before the
game\, but once the game starts they cannot communicate.
Paradoxical Theorem: There are strategies that Alice and Bob can
follow that guarantee that at least one of them will guess
correctly. The proof uses the axiom of choice\, but a recent
theorem of Elliot Glazer calls into question whether the axiom of
choice can be blamed for the paradox.
LOCATION:Zoom ID: 933 3713 8035\, Passcode: 949247
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a00c0@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210406T100000
CATEGORIES:Combinatorics Seminar
SUMMARY:Andrés R. Vindas Meléndez: Decompositions of Ehrhart
h*-Polynomials for Rational Polytopes
DESCRIPTION:The Ehrhart quasipolynomial of a rational polytope P
encodes the number of integer lattice points in dilates of P\, and
the h* -polynomial of P is the numerator of the accompanying
generating function. We provide two decomposition formulas for the
h*-polynomial of a rational polytope. The first decomposition
generalizes a theorem of Betke and McMullen for lattice polytopes.
We use our rational Betke--McMullen formula to provide a novel proof
of Stanley's Monotonicity Theorem for the h*-polynomial of a
rational polytope. The second decomposition generalizes a result of
Stapledon\, which we use to provide rational extensions of the
Stanley and Hibi inequalities satisfied by the coefficients of the
h*-polynomial for lattice polytopes. Lastly\, we apply our results
to rational polytopes containing the origin whose duals are lattice
polytopes. This is joint work with Matthias Beck (San Francisco
State Univ. & FU Berlin) and Ben Braun (Univ. of Kentucky).\n\nThe
talk will be followed by a tea with the speaker.\n\nMeeting ID: 954
4736 6763\n\nPasscode: Catalan#
LOCATION:Zoom
URL:http://www.math.dartmouth.edu/~comb/
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a0111@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210406T160000
CATEGORIES:Geometry Seminar
SUMMARY:Raquel Perales: Convergence of manifolds under volume
convergence\, a tensor and a diameter bound
DESCRIPTION:Abstract: Given a closed and oriented manifold $M$ and
Riemannian tensors $g_0 \\leq g_j$ on $M$ that satisfy $vol(M\,
g_j)\\to vol(M\,g_0)$ and $diam(M\,g_j)\\leq D$ we will see that
$(M\,g_j)$ converges to $(M\,g_0)$ in the volume preserving
intrinsic flat sense. \n\nWe note that under these conditions we do
not necessarily obtain smooth\, $C^0$ or even Gromov-Hausdorff
convergence. Nonetheless\, this result can be applied to show
stability of a class of tori. That is\, any sequence of tori in this
class with almost nonnegative scalar curvature converge to a flat
tori. Finally\, we will see that an analogous convergence result for
manifolds with boundary can be applied to show stability of the
positive mass theorem for a particular class of manifolds. [Based on
joint work with Allen\, Allen-Sormani and Cabrera Pacheco-Ketterer]
LOCATION:Zoom
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a0167@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210407T190000
DTEND;TZID=America/New_York:20210407T203000
CATEGORIES:Public Lecture
SUMMARY:Mary Gray: Don’t Say No! A Mathematician’s Journey into
Human Rights
DESCRIPTION:A travelogue of mathematics intertwined with human
rights has been my professional life. How did I move from my
childhood in Nebraska to using my skills on six continents? Trained
in abstract mathematics\, I switched to statistics and later to the
law\, seeking I told myself\, a way to use my knowledge to make the
world a better place\, meanwhile making it more interesting for me.
What motivated me to tackle the fortress of the mathematical
establishment\, the kingdom of actuaries\, the assorted violators of
human rights? What has proved useful in my quests? No matter how
interesting what I might be doing\, the opportunity to do more lured
me on. It seems I rarely resisted the prospect of using for a good
cause what I knew or could learn. But at the same time\, I had to
recognize and avoid the ethically questionable and the just
time-wasting tasks.\n\n\n\n(This event is sponsored by the AWM
Student Chapter in celebration of the 50th anniversary of the
Association for Women in Math. We will have a 30 minute time for
discussion after the talk. The discussion will NOT be
recorded.)\n\n\n
LOCATION:Online via Zoom
URL:https://math.dartmouth.edu/activities/special-events/
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a01b4@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210408T133000
CATEGORIES:Topology Seminar
SUMMARY:Patricia Cahn: Branched Covers of Trisected 4-Manifolds
DESCRIPTION:Zoom ID 870 912 2782\, Please ask Vladimir Chernov
vladimir.chernov@dartmouth.edu for the password\n\nAbstract: A
well-known theorem due to Hilden and Montesinos states that every
closed\, oriented 3-manifold is a 3-fold branched cover of $S^3$\,
branched along a knot. Piergallini later proved an analogous result
in dimension 4: every closed\, oriented 4-manifold is a 4-fold
branched cover of $S^4$\, branched along an immersed surface. A
trisection of an oriented\, closed\, 4-manifold X is a decomposition
of X into three 4-dimensional handlebodies\, analogous to Heegaard
splittings in dimension 3. We prove that if one of the three
handlebodies in a trisected 4-manifold X is a 4-ball\, then X is a
3-fold (rather than 4-fold) branched cover of $S^4$. The branching
set is a surface in $S^4$\, smoothly embedded except for one
singular point which is the cone on a link. This is joint work with
Ryan Blair\, Alexandra Kjuchukova\, and Jeffrey Meier.\n\n
LOCATION:Zoom\, please ask Vladimir Chernov for the login and
password
URL:https://math.dartmouth.edu/~topology/
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a01fd@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210413T100000
CATEGORIES:Combinatorics Seminar
SUMMARY:GaYee Park: Naruse hook formula for linear extensions of
mobile posets
DESCRIPTION:Linear extensions of posets are important objects in
enumerative and algebraic combinatorics that are difficult to count
in general. Families of posets like straight shapes and $d$-complete
posets have hook-length product formulas to count linear
extensions\, whereas families like skew shapes have determinant or
positive sum formulas like the Naruse hook length formula from 2014.
In 2020\, Garver et. al. gave determinant formulas to count linear
extensions of a family of posets called mobile posets that refine
d-complete posets and border strip skew shapes. We give a Naruse
type hook length formula to count linear extensions of such posets
as well $q$-analogues of our formula in both major and inversion
index. \n\nThe talk will be followed by a tea with the speaker.
Details will be announced later.\n\nMeeting ID: 954 4736
6763\nPasscode: Catalan#
LOCATION:Zoom
URL:http://www.math.dartmouth.edu/~comb
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a024d@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210413T145000
DTEND;TZID=America/New_York:20210413T153000
CATEGORIES:Algebra and Number Theory Seminar
SUMMARY:Angelica Babei: Period polynomials and Eichler cohomology
DESCRIPTION:The study of period polynomials for classical modular
forms has emerged due to their role in Eichler cohomology. In
particular\, the Eichler-Shimura isomorphism gives a correspondence
between cusp eigenforms and their period polynomials. The
coefficients of period polynomials also encode critical L-values for
the associated modular form and thus contain rich arithmetic
information. In this talk\, we will examine period polynomials from
both angles\, including their cohomological interpretation as well
as some of their analytic properties. Finally\, I will describe
joint work with Larry Rolen and Ian Wagner\, where we introduce
period polynomials for Hilbert modular forms of full level and prove
that their zeros lie on the unit circle.
LOCATION:Meeting ID: 939 1193 8570\, Passcode: 876807
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a029f@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210415T133000
CATEGORIES:Topology Seminar
SUMMARY:Juanita Pinzon-Caicedo: Toroidal integer homology spheres
have irreducible SU(2)-representations.
DESCRIPTION:Toroidal integer homology spheres have irreducible
SU(2)-representations.\nAbstract: The fundamental group is one of
the most powerful invariants to distinguish closed three-manifolds.
\nOne measure of the non-triviality of a three-manifold is the
existence of non-trivial SU(2)-representations. \nIn this talk I
will show that if an integer homology three-sphere contains an
embedded incompressible torus\, \nthen its fundamental group admits
irreducible SU(2)-representations. This is joint work with Tye
Lidman and \nRaphael Zentner.
LOCATION:Meeting ID: 976 0635 1780\, Passcode: 385355
URL:www.math.dartmouth.edu/~topology
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a02fd@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210420T100000
CATEGORIES:Combinatorics Seminar
SUMMARY:Erika Roldan: Topology and local geometry of random and
extremal polyominos
DESCRIPTION:Schedule subject to change.\n\nDo you know what
algorithm is deciding which piece you get next in a Tetris game? In
this talk I will start by answering this question and then I will
tell you about several different ways of sampling random polyominoes
(polyominoes are like tetrominoes but with any desired amount of
squares). We will also analyze how the topological and geometric
properties of polyominoes change depending on the distribution that
we choose to sample them. Finally\, we will have a look at beautiful
polyform structures that reach extremal topological properties and
that are\, as expected\, very much unlikely to be observed by any
sampling method.\n\nMeeting ID: 954 4736 6763\nPassword: Catalan#\n
LOCATION:Zoom
URL:http://www.math.dartmouth.edu/~comb/
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a034f@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210420T145000
DTEND;TZID=America/New_York:20210420T153000
CATEGORIES:Algebra and Number Theory Seminar
SUMMARY:Kimball Martin: Quaternionic modular forms and applications
DESCRIPTION:I will give a brief introduction to modular forms on
definite quaternion algebras. In the simplest case\, these boil
down to functions on a finite set\, with an action of Hecke
operators\, and are eminently computable. By work of Eichler\,
Shimizu and Jacquet-Langlands\, quaternionic modular forms
correspond to classical (elliptic or Hilbert) modular forms. I will
discuss some applications of quaternionic modular forms to classical
modular forms\, such as computation\, congruences and central values
of L-functions.
LOCATION:Meeting ID: 939 1193 8570\, Passcode: 876807
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a0395@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210422T133000
CATEGORIES:Topology Seminar
SUMMARY:Roman Golovko: Subloose Legendrian tori from Bohr-Sommerfeld
covers of monotone Lagrangian tori
DESCRIPTION:Zoom ID 870 912 2782 and the Zoom Link
https://dartmouth.zoom.us/j/8709122782?pwd=NHhGcTNPU3BXVkZOTW9FYVR6OWpZQT09\n\nPlease
ask Vladimir Chernov vladimir.chernov@dartmouth.edu for a password
\n\nBy a result due to Ziltener\, there exist no closed embedded
Bohr-Sommerfeld Lagrangians inside CP^n for the prequantisation
bundle whose total space is the standard contact sphere. On the
other hand\, any embedded monotone Lagrangian torus has a canonical
nontrivial cover which is a Bohr-Sommerfeld immersion. We draw the
front projections for the corresponding Legendrian lifts inside a
contact Darboux ball of the threefold covers of both the
two-dimensional Clifford and Chekanov tori (the former is the
Legendrian link of the Harvey-Lawson special Lagrangian cone)\, and
compute the associated Chekanov-Eliashberg algebras. Although these
Legendrians are not loose\, we show that they both admit exact
Lagrangian cobordisms to the loose Legendrian sphere\; they hence
admit exact Lagrangian caps in the symplectisation\, which are
non-regular Lagrangian cobordisms.\nIn addition\, we will discuss
the conjecture relating superpotential of an embedded monotone
Lagrangian two-torus in CP2 with the augmentation polynomial of the
Legendrian lift of its canonical threefold Bohr-Sommerfeld cover.
This is joint work in progress with Georgios Dimitroglou
Rizell.\n\n\n\n
LOCATION:Zoom\, please ask Vladimir Chernov for the Zoom ID and the
Password
URL:https://math.dartmouth.edu/~topology/#Apr22
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a03e1@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210429T013000
CATEGORIES:Topology Seminar
SUMMARY:Vladimir Nezhinski: Isotopy invariants of space disk-ribbon
graphs.
DESCRIPTION:The main goal of the talk is to reduce the problem of
isotopy\nclassification of space graphs\, equipped with an
additional structure - a\nframing\, a skeleton and a marked point\,
to the problem of isotopy\nclassification of tangles.
LOCATION:Zoom 870 912 2782\, please ask Vladimir Chernov for the
password
URL:https://math.dartmouth.edu/~topology/
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a0425@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210429T150000
DTEND;TZID=America/New_York:20210429T160000
CATEGORIES:Thesis Defence
SUMMARY:Laura Petto: Thesis Defense: Optimization\, Statistical
Inverse Problems\, and Sampling
LOCATION:zoom
URL:https://dartmouth.zoom.us/j/95305308169?pwd=K2V6Nmx4TjNUU3pYei9CTTl3V3Jldz09&from=addon
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a0467@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210430T080000
DTEND;TZID=America/New_York:20210430T100000
CATEGORIES:Thesis Defence
SUMMARY:Xingru Chen: Evolutionary Dynamics of Human Cooperation
across Scales: Dyads\, Networks\, and Populations
DESCRIPTION:Meeting ID: 971 0090 4653\nPasscode: 975996
LOCATION:Zoom
URL:https://dartmouth.zoom.us/j/97100904653?pwd=aUtlYlV0a3FETUU2OGllZHBLaWRVdz09
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a04a9@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210504T100000
CATEGORIES:Combinatorics Seminar
SUMMARY:Mike Zabrocki: See-saw pairs and set valued tableaux
DESCRIPTION:Abstract to come.\n \n\nThe talk will happen over
Zoom\, and will be followed by a tea with the speaker.\n\nMeeting
ID: 954 4736 6763\n\nPasscode: Catalan#
LOCATION:Zoom
URL:https://math.dartmouth.edu/~comb/
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a04ed@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210504T145000
DTEND;TZID=America/New_York:20210504T153000
CATEGORIES:Algebra and Number Theory Seminar
SUMMARY:Ciaran Schembri: TBA
LOCATION:Meeting ID: 939 1193 8570\, Passcode: 876807
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a052b@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210511T100000
CATEGORIES:Combinatorics Seminar
SUMMARY:Ira Gessel: Counting acyclic digraphs by descents
DESCRIPTION:Details to be announced.\n\nThe talk will happen over
Zoom\, and will be followed by a tea with the speaker.\n\nMeeting
ID: 954 4736 6763\n\nPasscode: Catalan#
LOCATION:Zoom
URL:http://www.math.dartmouth.edu/~comb/
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a056e@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210511T145000
DTEND;TZID=America/New_York:20210511T153000
CATEGORIES:Algebra and Number Theory Seminar
SUMMARY:Taylor Dupuy: TBA
LOCATION:Meeting ID: 939 1193 8570\, Passcode: 876807
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a05ad@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210513T153000
CATEGORIES:Math Colloquium
SUMMARY:Kiumaras Kaveh: TBA
DESCRIPTION:Zoom ID 870 912 2782 and the web link is
https://dartmouth.zoom.us/j/8709122782?pwd=NHhGcTNPU3BXVkZOTW9FYVR6OWpZQT09\n\nPlease
ask Vladimir Chernov vladimir.chernov@dartmouth.edu for the password
LOCATION:Zoom
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a05ef@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210518T100000
CATEGORIES:Combinatorics Seminar
SUMMARY:Stoyan Dimitrov: Sorting by shuffling methods and a queue
DESCRIPTION:We consider sorting by a queue that can apply a
permutation from a given set over its content. This gives us a
sorting device $\\mathbb{Q}_{\\Sigma}$ corresponding to any
shuffling method $\\Sigma$ since every such method is associated
with a set of permutations. Two variations of these devices are
considered - $\\mathbb{Q}_{\\Sigma}^{\\prime}$ and
$\\mathbb{Q}_{\\Sigma}^{\\text{pop}}$. These require the entire
content of the device to be unloaded after a permutation is applied
or unloaded by each pop operation\, respectively.\n\nFirst\, we show
that sorting by a deque is equivalent to sorting by a queue that can
reverse its content. Next\, we focus on sorting by cuts\, which has
significance in computational biology and a natural interpretation.
We prove that the set of permutations that can be sorted by using
$\\mathbb{Q}_{\\text{cuts}}^{\\prime}$ is the set of the
321-avoiding separable permutations. We also give lower and upper
bounds to the maximum number of times the device must be used to
sort a permutation. These are analogues of the bounds previously
obtained by Eriksson et al.\n\nFurthermore\, we give a formula for
the number of n-permutations that one can sort by using
$\\mathbb{Q}_{\\Sigma}^{\\prime}$\, for any shuffling method
$\\Sigma$\, such that the permutations associated with it are
irreducible. The rest of the work is dedicated to a surprising
conjecture inspired by Diaconis and Graham which states that one can
sort the same number of permutations of any given size by using the
devices $\\mathbb{Q}_{\\text{In-sh}}^{\\text{pop}}$ and
$\\mathbb{Q}_{\\text{Monge}}^{\\text{pop}}$\, corresponding to the
popular In-shuffle and Monge shuffling methods. \n\nThe talk will
happen over Zoom\, and will be followed by a tea with the
speaker.\n\nMeeting ID: 954 4736 6763\n\nPasscode: Catalan#
LOCATION:Zoom
URL:https://math.dartmouth.edu/~comb/
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a0640@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210518T145000
DTEND;TZID=America/New_York:20210518T153000
CATEGORIES:Algebra and Number Theory Seminar
SUMMARY:Juanita Duque Rosero: TBA
LOCATION:Meeting ID: 939 1193 8570\, Passcode: 876807
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a067e@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210519T180000
CATEGORIES:&ac\; Prosser Lecture &ac\;
SUMMARY:Colm Mulcahy: TBA
DESCRIPTION:Zoom ID 922 7125 3913 and the Zoom Link is
https://dartmouth.zoom.us/j/92271253913?pwd=V28zVVA4S2xiSVVCMFRzckxjNVg3Zz09\n\nPlease
contact Vladimir Chernov vladimir.chernov@dartmouth.edu for the
password
LOCATION:Zoom ID 922 7125 3913
URL:https://math.dartmouth.edu/calendar/more.php?event_id=2714
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a06c1@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210520T180000
CATEGORIES:&ac\; Prosser Lecture &ac\;
SUMMARY:TBA
DESCRIPTION:Zoom ID 922 7125 3913\n\nZoom Web Link
https://dartmouth.zoom.us/j/92271253913?pwd=V28zVVA4S2xiSVVCMFRzckxjNVg3Zz09\n\nPlease
contact Vladimir Chernov vladimir.chernov@dartmouth.edu for the
password
LOCATION:Zoom
URL:https://math.dartmouth.edu/calendar/more.php?event_id=2715
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a0702@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210525T145000
DTEND;TZID=America/New_York:20210525T153000
CATEGORIES:Algebra and Number Theory Seminar
SUMMARY:Carl Pomerance: TBA
LOCATION:Meeting ID: 939 1193 8570\, Passcode: 876807
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a0740@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210527T153000
CATEGORIES:Math Colloquium
SUMMARY:Anne Schilling: New ideas about Markov chain
DESCRIPTION:The Zoom ID is 870 912 2782 and the direct link is
https://dartmouth.zoom.us/j/8709122782?pwd=NHhGcTNPU3BXVkZOTW9FYVR6OWpZQT09\n\nPlease
ask Vladimir Chernov vladimir.chernov@dartmouth.edu for the
password\n\nWe will discuss some new ideas from semigroup theory to
analyze the stationary distribution and mixing time of finite Markov
chains. An example for a Markov chain is card shuffling and a
natural question is: how often do you have to shuffle the deck
before it is mixed or random? It turns out that semigroup theory can
help answer these questions.\n
LOCATION:Zoom
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a0785@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210601T100000
CATEGORIES:Combinatorics Seminar
SUMMARY:Shraddha Srivastava: TBA
DESCRIPTION:Details to be announced.\n\nThe talk will happen over
Zoom\, and will be followed by a tea with the speaker.\n\nMeeting
ID: 954 4736 6763\n\nPasscode: Catalan#
LOCATION:Zoom
URL:http://www.math.dartmouth.edu/~comb/
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20210421T114701Z
UID:20210421T074701608010b5a07c8@math.dartmouth.edu
DTSTART;TZID=America/New_York:20210601T145000
DTEND;TZID=America/New_York:20210601T153000
CATEGORIES:Algebra and Number Theory Seminar
SUMMARY:TBA
LOCATION:Meeting ID: 939 1193 8570\, Passcode: 876807
END:VEVENT
END:VCALENDAR