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Hamiltonian systems, symplectic flows, classical integrable systems
6
votes
Introduction to Floer Theory?
I wholeheartedly agree with both of Chris Gerig's suggestions.
The small McDuff-Salamon book on holomorphic curves ("J-holomorphic curves and quantum cohomology", available on McDuff's webpage) has a …
4
votes
Accepted
Path of almost complex structure in the definition of Heegaard Floer homology
According to Proposition 3.9 of Ozsvath and Szabo's original paper "Holomorphic disks and topological invariants for closed three-manifolds" there are indeed topological conditions one can put on the …
7
votes
Simple examples of Gromov-Witten invariants not being enumerative
I'm not sure if this is quite what you're looking for, but I always found it a useful example to keep in mind. Take the genus 1 invariant for degree 1 maps into $P^1$. There are no degree 1 holomorphi …
1
vote
Why are symplectic toric varieties projective?
Not a full answer, but a partial answer to your question 1a.
Torus-invariant Kaehler metrics (in particular complex structures) were constructed by Guillemin, just starting with data on the moment pol …
2
votes
Accepted
Could this be a Hamiltonian symplectomorphism on a symplectic toric manifold
Sometimes it is, sometimes it isn't.
The spheres living over the edges generate the second homology, so you can read off the action on $H_2$ from that. For $S^2\times S^2$ (square) the action on homol …
5
votes
Infinity local systems
Since you tagged this with "symplectic geometry", I'm going to give an answer from a symplectic geometry perspective, which may not be what you're looking for, but (as a symplectic person) I find it i …
5
votes
Accepted
Progress on composition of Lagrangian correspondences/definition of symplectic categories?
Though not about solving the nontransversality problem, Fukaya's paper Unobstructed immersed Lagrangian correspondence and filtered A infinity functor is the state of the art in why nontransversality …
5
votes
Accepted
Question on Gromov-Witten invariants when $A=0$
In this case, the J-holomorphic curves are all constant, so the
evaluation pseudocycle is the tridiagonal $\{(x,x,x) : x\in
M\}$. You take cycles $A_1,A_2,A_3$ Poincare dual to
$a_1,a_2,a_3$ respectiv …
5
votes
Accepted
Almost toric mutations
Mutation doesn't even change the integral affine base, which is why it doesn't change the symplectic manifold. All you're doing is changing the way the integral affine base is drawn. If you're given a …
26
votes
Has anything precise been written about the Fukaya category and Lagrangian skeletons?
I noticed this question has been bumped up to the front page, and the
most recent answer is about 8 years old: the subject has moved on
since then, and more has been written. Here is my understanding …
3
votes
From Delzant polytope to lattice polytope
If you have a lattice polytope then you get a projective toric variety. If your polytope is not a lattice polytope then you can still construct a symplectic toric manifold (e.g. by performing symplect …
0
votes
Accepted
Maslov index equal to $2$ implies that the disk is not multiply covered
First, I assume you want $w$ to be holomorphic (or else it isn't true).
If the target is really $S^2$ with boundary on the equator $L$ then this should be easy to prove directly. Take a point $p$ not …
4
votes
Accepted
$\mathbb{R}\mathbb{P}^n$ is monotone in $\mathbb{C}\mathbb{P}^n$, Lagrangian floer cohomology
The relative homology long exact sequence puts this group in between $H_2(\mathbb{CP}^n)=\mathbb{Z}$ and $\mathbb{Z}/2$. It maps surjectively to $\mathbb{Z}/2$. Let D be a generator for relative homol …
8
votes
Accepted
Cotangent bundles of surfaces as varieties
This is not possible. There is something called the growth rate of symplectic cohomology which is subexponential for affine varieties and exponential for cotangent bundles of higher genus surfaces (am …
2
votes
Accepted
Boundary Maslov index of holomorphic disks in Calabi-Yau manifolds
I assume you're asking about embedded or at least immersed discs, in
order to make sense of the normal bundle. If so, let's fix an
immersion $\iota\colon\Sigma\to M$ and observe that the pullback
bund …