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May
29
comment How to prove that a certain action is hamiltonian?
@Theo Buehler: Yes surely it is due to the foundational work of Elié Cartan, but I thought it was named after his son Henri Cartan, for this formula is singled out in his axiomatic presentation of the equivariant cohomology for smooth manifolds acted by a Lie group. Precisely, I found it under this name in Symplectic Geometry and Analytical Mechanics of Libermann and Marle. Thanks again for your help with editing and for your suggestion about LaTeX.
May
29
comment How to prove that a certain action is hamiltonian?
@Theo Buehler: Thanks a lot.
May
29
comment How to prove that a certain action is hamiltonian?
Please, excuse me, even if I exactly copied the text of the quoted question, here I have some difficulties in visualizing the sketched proof. Do you have the same troubles?
May
29
revised How to prove that a certain action is hamiltonian?
added 4 characters in body; added 1 characters in body
May
29
revised How to prove that a certain action is hamiltonian?
trying to correct tex; deleted 5 characters in body
May
29
asked How to prove that a certain action is hamiltonian?
May
26
revised Proof of Upper bound of price of anarchy in local connection game
edited tags
May
24
revised A mass spring model for hair simulation
edited tags
May
23
revised What are “perfectoid spaces”?
edited tags
May
22
revised The $ Pic ^ 0 $ of an abelian variety
edited tags
May
22
comment $D_X$ algebras, $D_X$ schemes, connections
I supposed Beilinson Drinfeld Chiral Algebras ams.org/bookstore-getitem/item=COLL-51
May
17
revised What is a good way to think about a fundamental field on a principal G-bundle?
deleted 1 characters in body
May
17
revised What is a good way to think about a fundamental field on a principal G-bundle?
added 518 characters in body; added 2 characters in body
May
17
answered What is a good way to think about a fundamental field on a principal G-bundle?
May
12
revised Periodic orbits of Hamiltonian systems
added 9 characters in body
May
12
revised Periodic orbits of Hamiltonian systems
inserted a link, and quoted a theorem
May
12
answered Periodic orbits of Hamiltonian systems
May
5
answered Most memorable titles
May
4
comment About the geometry of completely integrable systems
Excuse me for the delay in accepting the answer. I believed to have already accepted it after my last comment. Probably then I clicked twice; the first accepting, and the second time inadvertently to dismiss. My mistake.
May
4
accepted About the geometry of completely integrable systems