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- W1978520729 abstract "We prove that if u(t) is a log-log blow-up solution, of the type studied by Merle and Raphael, to the L2 critical focusing NLS equation i∂tu+Δu+|u|4∕du=0 with initial data u0∈H1(ℝd) in the cases d=1,2, then u(t) remains bounded in H1 away from the blow-up point. This is obtained without assuming that the initial data u0 has any regularity beyond H1(ℝd). As an application of the d=1 result, we construct an open subset of initial data in the radial energy space Hrad1(ℝ3) with corresponding solutions that blow up on a sphere at positive radius for the 3D quintic (Ḣ1-critical) focusing NLS equation i∂tu+Δu+|u|4u=0. This improves the results of Raphael and Szeftel [2009], where an open subset in Hrad3(ℝ3) is obtained. The method of proof can be summarized as follows: On the whole space, high frequencies above the blow-up scale are controlled by the bilinear Strichartz estimates. On the other hand, outside the blow-up core, low frequencies are controlled by finite speed of propagation." @default.
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- W1978520729 date "2012-10-15" @default.
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- W1978520729 title "Blow-up solutions on a sphere for the 3D quintic NLS in the energy space" @default.
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- W1978520729 doi "https://doi.org/10.2140/apde.2012.5.475" @default.
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