Abstract
We prove that the weak Riemannian metric induced by the fractional Sobolev norm H s on the diffeomorphism group of the circle is geodesically complete, provided that s > 3/2.
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Escher, J., Kolev, B. Geodesic completeness for Sobolev H s-metrics on the diffeomorphism group of the circle. J. Evol. Equ. 14, 949–968 (2014). https://doi.org/10.1007/s00028-014-0245-3
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DOI: https://doi.org/10.1007/s00028-014-0245-3