On geodesic exponential maps of the Virasoro group
On geodesic exponential maps of the Virasoro group
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DOI:
10.1007/s10455-006-9042-8
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发表时间:
2007-02
影响因子:
0.7
通讯作者:
A. Constantin;A. Constantin;T. Kappeler;B. Kolev;P. Topalov
中科院分区:
文献类型:
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作者:
A. Constantin;A. Constantin;T. Kappeler;B. Kolev;P. Topalov
We study the geodesic exponential maps corresponding to Sobolev type right-invariant (weak) Riemannian metrics μ(k)(k≥ 0) on the Virasoro groupVirand show that fork≥ 2, butnotfork= 0,1, each of them defines a smooth Fréchet chart of the unital elemente∈Vir. In particular, the geodesic exponential map corresponding to the Korteweg–de Vries (KdV) equation (k= 0) isnota local diffeomorphism near the origin.