Equality of intrinsic and extrinsic reinforced spaces on the cube

From papers

Let QQ be the unit cube in Rn\mathbb{R}^n for n2n\geq 2. For 1p<1\leq p<\infty, 0<q<0<q<\infty, and s>σp,qs>\sigma_{p,q}, let Fp,qs,rinf(Q)F_{p,q}^{s,\operatorname{rinf}}(Q) denote the reinforced function space defined using a continuation outside the singular boundary strata, and let Fp,qs,rinf(Q)F_{p,q}^{s,\operatorname{rinf}}(Q)^* denote the intrinsically reinforced space defined by boundary decay conditions from inside QQ. Equality conjecture. One should have

Fp,qs,rinf(Q)=Fp,qs,rinf(Q).F_{p,q}^{s,\operatorname{rinf}}(Q)=F_{p,q}^{s,\operatorname{rinf}}(Q)^*.

The intrinsic definition is known to contain the continuation-based space by restriction, so the conjecture asks whether every function satisfying the interior reinforce properties admits the corresponding global continuation.

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Sources & referencesView supporting material

Primary source

Benjamin Scharf, “Wavelets in function spaces on cellular domains”, arXiv:1302.3751 (2013).

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