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S Jan 28, 2018 at 11:41 history suggested Ali Taghavi
I add two tags.
Jan 28, 2018 at 10:46 review Suggested edits
S Jan 28, 2018 at 11:41
Jan 15, 2018 at 16:16 comment added Tobias Diez On a slightly different note, it is quite remarkable that the picture you draw also generalize to "non-linear" Grassmannians, i.e. the infinite-dimensional space of all codimension 2 submanifolds. In this case, one can determine a lattice of integral symplectic forms and the prequantum construction gives central extensions of the group of volume-preserving diffeomorphisms. See arxiv.org/abs/math/0305089v1 for more details.
Jan 15, 2018 at 2:36 answer added Francois Ziegler timeline score: 1
Jan 15, 2018 at 2:26 history edited John Baez CC BY-SA 3.0
added 1 character in body
Jan 15, 2018 at 1:50 answer added user17945 timeline score: 2
Jan 14, 2018 at 10:46 comment added abx In fact $\operatorname{Gr}(n,2) $ is isomorphic to the complex quadric $Q_{n-2}$ in $\mathbb{P}^{n-1}_{\mathbb{C}}$.
Jan 14, 2018 at 10:01 answer added Ben McKay timeline score: 7
Jan 14, 2018 at 9:30 comment added Ben McKay I recall learning that these Grassmannians are Kaehler from Domingo Toledo about 2 decades ago, but I might not be remembering correctly. I think that Cartan's structure equations for the action of the special orthogonal group (method of the moving frame) make it clear how to write out the Kaehler form.
Jan 14, 2018 at 7:08 history asked John Baez CC BY-SA 3.0