Equality of intrinsic and extrinsic reinforced spaces on the cube

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Let QQ be the unit cube in Rn\mathbb{R}^n for n≥2n\geq 2. For 1≤p<∞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.

References

Primary source

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

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