Can we run to infinity? The diameter of the diffeomorphism group with respect to right-invariant Sobolev metrics
Can we run to infinity? The diameter of the diffeomorphism group with respect to right-invariant Sobolev metrics
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我们能跑到无穷远吗?
DOI:
10.1007/s00526-021-01918-6
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发表时间:
2021
影响因子:
2.1
通讯作者:
Maor, Cy
中科院分区:
文献类型:
--
作者:
Bauer, Martin;Maor, Cy
The groupof diffeomorphisms of a closed manifoldis naturally equipped with various right-invariant Sobolev norms. Recent work showed that for sufficiently weak norms, the geodesic distance collapses completely (namely, whenand). But when there is no collapse, what kind of metric space is obtained? In particular, does it have a finite or infinite diameter? This is the question we study in this paper. We show that the diameter is infinite for strong enough norms, when, and that for spheres the diameter is finite when. In particular, this gives a full characterization of the diameter of. In addition, we show that for, if the diameter is not zero, it is infinite.
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影响因子:
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DOI:
10.4310/arkiv.2021.v59.n2.a2
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期刊:
Arkiv för Matematik
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