Soliton resolution for equivariant wave maps from hyperbolic space

Consider the equivariant wave-map Cauchy problem on R×H2\mathbb{R}\times\mathbb{H}^2 with finite energy initial data (ψ0,ψ1)(\psi_0,\psi_1). The finite energy harmonic maps are

Pλ(r)=2arctanh(λarctanh(r/2)),λ[0,1),P_\lambda(r)=2\operatorname{arctanh}\bigl(\lambda\operatorname{arctanh}(r/2)\bigr),\qquad \lambda\in[0,1),

and define

λ=tanh(ψ0()/2)[0,1).\lambda=\tanh\bigl(\psi_0(\infty)/2\bigr)\in[0,1).

Soliton resolution conjecture. The Cauchy problem is globally well-posed, and its solution scatters to PλP_\lambda as t±t\to\pm\infty. The harmonic maps PλP_\lambda minimize the energy in the corresponding endpoint classes, and the source notes that the conjecture was verified for endpoints λΛ0\lambda\leq\Lambda_0 with Λ00.57\Lambda_0\geq0.57, leaving λ[Λ0,1)\lambda\in[\Lambda_0,1) open.

Sources & referencesView supporting material

Primary source

Andrew Lawrie, Sung-Jin Oh and Sohrab Shahshahani, “The Cauchy problem for wave maps on hyperbolic space in dimensions d 4”, arXiv:1510.04296 (2015).

Additional references

2 papers in this index state this conjecture (2015). The statement above is taken from the most recent of them; the others are arXiv:1505.03728.

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