## Symplectic Zoominar (CRM-Montreal, Princeton/IAS, Tel Aviv, and
Paris).

**MAIN
ZOOM link: https://umontreal.zoom.us/j/94366166514?pwd=OHBWcGluUmJwMFJyd2IwS1ROZ0FJdz09
(Meeting ID: 943 6616 6514 ; Passcode: 113760)**

(alternate link: https://theias.zoom.us/j/97116147750?pwd=L2Fud1Y4Z2xsT3dhU2NrV0ZXd3lUQT09)

Date and hour: Fridays, 9:15 - 10:45 (Montreal/Princeton
hour).

Regular research talks are of 60 minutes; 30 minutes are
reserved for discussion at the end of each talk (see VARIA
below).

It is intended that talks be accessible to a global community in
symplectic geometry/topology and beyond (thus, they should
contain an introduction of interest to a broad
audience).

**The Zoominar promotes an atmosphere
of collegiality, equity and respect and is committed to creating
a welcoming and inclusive environment for all
participants, enabling them to fully focus on mathematics.**

** **

* ** *

Once a month we intend to have a seminar consisting of three 20
min talks (followed each by 10 min of discussion time) reserved
to young researchers/recent PhD's. In case you want to talk or
to nominate someone, **see VARIA 4 below.**

**Next meeting**:

**October 23: Michael Hutchings (Berkeley)**

*Title:* __Examples related to Viterbo's conjectures__

*Abstract:* Viterbo conjectured that a normalized
symplectic capacity, on convex domains of a given volume, is
maximized for the ball. A stronger version of this conjecture
asserts that all normalized symplectic capacities agree on convex
domains. Since convexity is not symplectomorphism invariant, one
can also ask to what extent these statements still hold for
nonconvex domains. We survey some special cases and examples
around these questions, including recent joint works with Julian
Chaidez and Jean Gutt + Vinicius Ramos.

Future talks:

**October 30: **

Three 20 min research talks:

**Simon Allais (ENS Lyon)**

*Title:** *__Generating functions in
Hamiltonian dynamics and symplectic-contact rigidity__

__Abstract:__ Generating functions of Hamiltonian
diffeomorphisms are maps that can be seen as finite dimensional
versions of the action functional. In various situations, classical
Morse theory applied to them can retrieve the same information as
the Floer theory. In this talk, I will introduce this tool and
expose some old and new results of Hamiltonian dynamics and
symplectic rigidity that can be retrieved and sometimes extended
using elementary Morse theory and generating functions; among
others, the recent theorem of Shelukhin about the Hofer-Zehnder
conjecture in the special case of CP^d and a contact generalization
of the symplectic camel theorem.

**Orsola Capovilla-Searle (Duke University)**

__Title:__ __Weinstein handle decompositions of
complements of toric divisors in toric 4 manifolds__

__Abstract:__ We consider toric 4 manifolds with certain
toric divisors that have normal crossing singularities. The normal
crossing singularities can be smoothed, changing the topology of the
complement. In specific cases this complement has a Weinstein
structure, and we develop an algorithm to construct a Weinstein
handlebody diagram of the complement of the smoothed toric divisor.
The algorithm we construct more generally gives a Weinstein
handlebody diagram for Weinstein 4-manifolds constructed by
attaching 2 handles to T*S for any surface S, where the 2 handles
are attached along the conormal lift of curves on S. Joint work with
Bahar Acu, Agnes Gadbled, Aleksandra Marinkovic, Emmy Murphy,
Laura Starkston and Angela Wu.

**Julian Chaidez (UC Berkeley)**

__Title:__ __ECH Embedding Obstructions For Rational
Surfaces__

__Abstract:__ Is the Gromov width on toric varieties
monotonic with respect to inclusions of moment polytopes? In this
talk, I will prove a generalization in dimension 4: the "width"
associated to a concave toric domain is monotonic with inclusion of
momenty polygons. This is an application of some new
algebro-geometric obstructions for embeddings of star-shaped domains
into rational surfaces. This work is joint with Ben Wormleighton.

--

**November 6: Kai Cieliebak (Augsburg)**, TBA

**November 13: Nick Sheridan (Edinburgh)**, TBA

**November 20: Paul Biran (ETH, Zürich)**, TBA

**November 27: ***Three 20 min research talks.*

**December 4: Eva Miranda (****
Universitat Politècnica de Catalunya)**, TBA

**December 11: Basak Gurel (University of Central Florida)**, TBA

** **** *** *

Past talks:

**October 16:** Umut Varolgunes (Stanford), *Mirror
symmetry for chain type polynomials* (slides), (video)

**October 9:** Lev Buhovski (Tel Aviv), *The Arnold
conjecture, spectral invariants and C^0 symplectic topology *(slides), (video)

**October 2: **Dusa McDuff (Columbia), *Embedding ellipsoids
into the one-point blowup of $\C P^2$*** **(slides), (video)

**September 25**: Jun Zhang (Montreal), *Triangulated
persistence categories *(slides),
(video)

September 18: Cheol-Hyun Cho (Seoul), *Fukaya
category for Landau-Ginzburg orbifolds and Berglund-H\"ubsch
homological mirror symmetry for curve singularities
*(slides), (video)

September 11: Vincent Colin (Nantes), *Reeb dynamics in
dimension 3 and broken book decompositions* (slides), (video)

September 4: Georgios Dimitroglou Rizell (Uppsala)*,
**Hamiltonian classification and unlinkedness
of fibres in cotangent bundles of Riemann surfaces *(slides), (video)

July 24: John Pardon (Princeton)*, Pontryagin--Thom for
orbifold bordism *(slides),
(video)

**July 17: **Three 20 min research talks*: *

Yusuke Kawamoto (Paris), *Homogeneous
quasimorphism, C^0-topology and Lagrangian intersection*
(slides); Shira Tanny (Tel
Aviv), *Floer theory of disjointly supported Hamiltonians* (slides) ; Javier
Martínez-Aguinaga (Madrid), *Formal Legendrian and
horizontal embeddings** *(slides), (video -for
the three talks)*. *

**July 10: **Peter Ozsvath (Princeton)*, Knot Floer
homology and bordered algebras** *(slides), (video)

**July 3: **Ana Rita Pires (Edinburgh)*, **
Infinite staircases and reflexive polygons* (slides), (video)

**June 26: **Ailsa Keating (Cambridge)*, Distinguishing
monotone Lagrangians via holomorphic annuli** *(slides), (video)

**June 19: **Igor Uljarevic (Belgrade), *Exotic
symplectomorphisms and contact circle action *(slides)*, *(video)

**June 12:** Mark Mclean (SUNY, Stony Brook), *Floer
Cohomology and Arc Spaces *(slides),
(video)

June 5: Three 20 min research talks:

Morgan Weiler (Rice): *Infinite staircases of symplectic
embeddings of ellipsoids into Hirzebruch surfaces *(slides), (video)*;
*Joé Brendel (Neuchatel): *Real Lagrangian Tori in toric
symplectic manifolds *(slides),
(video)*;
*Abror Pirnapasov (Bochum): *Reeb orbits that force
topological entropy *(slides),
(video).

**May 29:** Alex Oancea (Paris), *Duality for
Rabinowitz-Floer homology *(slides),
(video)

**May 22:** Denis Auroux (Harvard), *Mirrors of
curves and their Fukaya categories *(slides) , (video)

**May 15:** Jo Nelson (Rice), *Reflections on
Cylindrical Contact Homology* (slides),
(video)

May 8: Marco Mazzucchelli (ENS- Lyon), *Spectral
characterizations of Besse and Zoll Reeb flows *(slides)*, *(video)

**May 1st:** Alberto Abbondandolo
(Bochum), *Zoll contact forms are local maximisers of the
systolic ratio *(slides)

**April 24:** Lisa Traynor (Bryn Mawr)**, ***The
Geography of Immersed Lagrangian Fillings of Legendrian
Submanifolds *(slides),
(video)

**April 17: **Nicholas Wilkins
(Bristol)**, ***Equivariant quantum operations and
relations between them* (slides),
(video)

**April 10: **Leonid Polterovich (Tel Aviv)**, ***Geometry
of Quantum Uncertainty* (slides), (video)

**April 3: **Daniel Cristofaro-Gardiner (IAS)**,
***T**he Simplicity Conjectu**re *(slides),
(video)

**March 27**: Octav Cornea (Université de
Montréal), *Fragmentation pseudo-metrics and Lagrangian
submanifolds *(slides),
(video)

Varia:

1. **Please do not hesitate to ask questions**: first indicate
your intention (or even the question) by chat, then, when invited
by the host/organizer, use your microphone and video (if
available).

3. **There will be 30 min at the
end of each talk reserved for discussion.** The first 15
minutes (roughly) are, mainly, for questions addressed to
the speaker. After that, questions and answers may involve
different participants.

3. **We post links to the slides
of the talks as well as links to recordings** of the talks.

4. **W****e intend to have once a month a seminar
consisting of**** three 20min talks** (followed each by 10min
of discussion time) given by young researchers/recent PhD's.
Suggestions, nominations, and volunteers (including a title
and short abstract) should be sent to Egor Shelukhin at*
egorshel@gmail.com*
(with cc to* octav.cornea@gmail.com*
).

**Current Zoominar Organizers:** Daniel Álvarez-Gavela (MIT),
Octav Cornea (Montreal), Dan Cristofaro-Gardiner (IAS), Helmut Hofer
(IAS), **Yusuf Baris Kartal (Princeton)**
Leonid Polterovich (Tel Aviv), Egor Shelukhin (Montreal), Sara
Tukachinsky (IAS), Claude Viterbo (Paris), Zhengyi Zhou (IAS)