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| Content Provider | Springer Nature Link |
|---|---|
| Author | Grong, Erlend Markina, Irina Vasil’ev, Alexander |
| Copyright Year | 2014 |
| Abstract | We generalize the concept of sub-Riemannian geometry to infinite-dimensional manifolds modeled on convenient vector spaces. On a sub-Riemannian manifold $$M$$ , the metric is defined only on a sub-bundle $${{\mathrm{\mathcal {H}}}}$$ of the tangent bundle $$TM$$ , called the horizontal distribution. Similarly to the finite-dimensional case, we are able to split possible candidates for minimizing curves into two categories: semi-rigid curves that depend only on $${{\mathrm{\mathcal {H}}}}$$ , and normal geodesics that depend both on $${{\mathrm{\mathcal {H}}}}$$ itself and on the metric on $${{\mathrm{\mathcal {H}}}}$$ . In this sense, semi-rigid curves in the infinite-dimensional case generalize the notion of singular curves for finite dimensions. In particular, we study the case of regular Lie groups with invariant sub-Riemannian structure. As examples, we consider the group of sense-preserving diffeomorphisms $${{\mathrm{Diff}}}\, S^1$$ of the unit circle and the Virasoro–Bott group with their respective horizontal distributions chosen to be the Ehresmann connections with respect to a projection to the space of normalized univalent functions. In these cases we prove controllability and find formulas for the normal geodesics with respect to the pullback of the invariant Kählerian metric on the class of normalized univalent functions. The geodesic equations are analogues to the Camassa–Holm, Hunter–Saxton, KdV, and other known non-linear PDE. |
| Starting Page | 2474 |
| Ending Page | 2515 |
| Page Count | 42 |
| File Format | |
| ISSN | 10506926 |
| Journal | Journal of Geometric Analysis |
| Volume Number | 25 |
| Issue Number | 4 |
| e-ISSN | 1559002X |
| Language | English |
| Publisher | Springer US |
| Publisher Date | 2014-09-04 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Sub-Riemannian geometry Infinite-dimensional manifold Semi-rigid curves Group of diffeomorphisms of the circle Hamiltonian structures, symmetries, variational principles, conservation laws Symplectic structures of moduli spaces Group structures and generalizations on infinite-dimensional manifolds General theory of conformal mappings Completely integrable systems and methods of integration Differential Geometry Convex and Discrete Geometry Fourier Analysis Abstract Harmonic Analysis Dynamical Systems and Ergodic Theory Global Analysis and Analysis on Manifolds |
| Content Type | Text |
| Resource Type | Article |
| Subject | Geometry and Topology |
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