Symplectic Topology

Description: Symplectic Topology Quiz
Number of Questions: 15
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What is the symplectic form on a symplectic manifold?

  1. A closed 2-form.

  2. A non-degenerate 2-form.

  3. A closed and non-degenerate 2-form.

  4. A symplectic form is a closed and non-degenerate 2-form.


Correct Option: C
Explanation:

A symplectic form is a closed and non-degenerate 2-form. This means that it is a 2-form that is closed (i.e., its exterior derivative is zero) and non-degenerate (i.e., it is invertible at every point).

What is the Darboux theorem?

  1. Every symplectic manifold is locally symplectomorphic to the standard symplectic space.

  2. Every symplectic manifold is globally symplectomorphic to the standard symplectic space.

  3. Every symplectic manifold is locally symplectomorphic to a Darboux chart.

  4. Every symplectic manifold is globally symplectomorphic to a Darboux chart.


Correct Option: C
Explanation:

The Darboux theorem states that every symplectic manifold is locally symplectomorphic to a Darboux chart. This means that there is an open neighborhood of every point in the manifold that is symplectomorphic to the standard symplectic space.

What is a symplectic vector field?

  1. A vector field that preserves the symplectic form.

  2. A vector field that is tangent to the symplectic foliation.

  3. A vector field that is Hamiltonian.

  4. All of the above.


Correct Option: D
Explanation:

A symplectic vector field is a vector field that preserves the symplectic form, is tangent to the symplectic foliation, and is Hamiltonian. These three conditions are equivalent.

What is a symplectic Hamiltonian system?

  1. A system of differential equations that describes the motion of a particle in a symplectic manifold.

  2. A system of differential equations that describes the motion of a fluid in a symplectic manifold.

  3. A system of differential equations that describes the motion of a wave in a symplectic manifold.

  4. All of the above.


Correct Option: D
Explanation:

A symplectic Hamiltonian system is a system of differential equations that describes the motion of a particle, fluid, or wave in a symplectic manifold. These systems are characterized by the fact that they are Hamiltonian, meaning that they can be written in terms of a Hamiltonian function.

What is the Arnold conjecture?

  1. Every symplectic manifold is symplectomorphic to a cotangent bundle.

  2. Every symplectic manifold is symplectomorphic to a product of spheres.

  3. Every symplectic manifold is symplectomorphic to a complex manifold.

  4. None of the above.


Correct Option: D
Explanation:

The Arnold conjecture is a famous unsolved problem in symplectic topology. It states that every symplectic manifold is symplectomorphic to a cotangent bundle. This conjecture has been proven for some special cases, but it is still open in general.

What is the Weinstein conjecture?

  1. Every symplectic manifold is symplectomorphic to a Weinstein manifold.

  2. Every symplectic manifold is symplectomorphic to a product of Weinstein manifolds.

  3. Every Weinstein manifold is symplectomorphic to a cotangent bundle.

  4. None of the above.


Correct Option: A
Explanation:

The Weinstein conjecture is a famous unsolved problem in symplectic topology. It states that every symplectic manifold is symplectomorphic to a Weinstein manifold. This conjecture has been proven for some special cases, but it is still open in general.

What is a symplectic embedding?

  1. An embedding that preserves the symplectic form.

  2. An embedding that is symplectomorphic to the standard symplectic embedding.

  3. An embedding that is Hamiltonian.

  4. All of the above.


Correct Option: A
Explanation:

A symplectic embedding is an embedding that preserves the symplectic form. This means that it is an embedding that maps symplectic manifolds to symplectic manifolds in a way that preserves the symplectic form.

What is a symplectic isotopy?

  1. A smooth family of symplectic embeddings.

  2. A smooth family of symplectomorphisms.

  3. A smooth family of Hamiltonian embeddings.

  4. All of the above.


Correct Option: D
Explanation:

A symplectic isotopy is a smooth family of symplectic embeddings, symplectomorphisms, or Hamiltonian embeddings. These three types of isotopies are equivalent.

What is the Floer homology of a symplectic manifold?

  1. A homology theory that is defined on symplectic manifolds.

  2. A homology theory that is defined on cotangent bundles.

  3. A homology theory that is defined on Weinstein manifolds.

  4. All of the above.


Correct Option: A
Explanation:

Floer homology is a homology theory that is defined on symplectic manifolds. It is a powerful tool for studying the topology of symplectic manifolds.

What is the Gromov-Witten theory?

  1. A theory that counts the number of pseudoholomorphic curves in a symplectic manifold.

  2. A theory that counts the number of symplectic embeddings of a symplectic manifold into another symplectic manifold.

  3. A theory that counts the number of symplectic isotopies of a symplectic manifold.

  4. None of the above.


Correct Option: A
Explanation:

Gromov-Witten theory is a theory that counts the number of pseudoholomorphic curves in a symplectic manifold. It is a powerful tool for studying the topology of symplectic manifolds.

What is the symplectic Lefschetz theorem?

  1. A theorem that relates the symplectic homology of a symplectic manifold to its cohomology.

  2. A theorem that relates the Floer homology of a symplectic manifold to its cohomology.

  3. A theorem that relates the Gromov-Witten theory of a symplectic manifold to its cohomology.

  4. None of the above.


Correct Option: A
Explanation:

The symplectic Lefschetz theorem is a theorem that relates the symplectic homology of a symplectic manifold to its cohomology. It is a powerful tool for studying the topology of symplectic manifolds.

What is the Weinstein conjecture?

  1. Every symplectic manifold is symplectomorphic to a Weinstein manifold.

  2. Every Weinstein manifold is symplectomorphic to a cotangent bundle.

  3. Every symplectic manifold is symplectomorphic to a product of Weinstein manifolds.

  4. None of the above.


Correct Option: A
Explanation:

The Weinstein conjecture is a famous unsolved problem in symplectic topology. It states that every symplectic manifold is symplectomorphic to a Weinstein manifold. This conjecture has been proven for some special cases, but it is still open in general.

What is the Arnold conjecture?

  1. Every symplectic manifold is symplectomorphic to a cotangent bundle.

  2. Every symplectic manifold is symplectomorphic to a product of spheres.

  3. Every symplectic manifold is symplectomorphic to a complex manifold.

  4. None of the above.


Correct Option: A
Explanation:

The Arnold conjecture is a famous unsolved problem in symplectic topology. It states that every symplectic manifold is symplectomorphic to a cotangent bundle. This conjecture has been proven for some special cases, but it is still open in general.

What is the Gromov-Witten invariant?

  1. A number that counts the number of pseudoholomorphic curves in a symplectic manifold.

  2. A number that counts the number of symplectic embeddings of a symplectic manifold into another symplectic manifold.

  3. A number that counts the number of symplectic isotopies of a symplectic manifold.

  4. None of the above.


Correct Option: A
Explanation:

The Gromov-Witten invariant is a number that counts the number of pseudoholomorphic curves in a symplectic manifold. It is a powerful tool for studying the topology of symplectic manifolds.

What is the Floer homology group?

  1. A homology group that is defined on symplectic manifolds.

  2. A homology group that is defined on cotangent bundles.

  3. A homology group that is defined on Weinstein manifolds.

  4. All of the above.


Correct Option: A
Explanation:

The Floer homology group is a homology group that is defined on symplectic manifolds. It is a powerful tool for studying the topology of symplectic manifolds.

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