Metastable Local Disjunction conjecture

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Let D=Ds1⊔…⊔DsrD=D^{s_1}\sqcup\ldots\sqcup D^{s_r} be a disjoint union of rr disks, let f:D→Bdf:D\to B^d be a proper PL map such that f∂Ds1∩…∩f∂Dsr=∅f\partial D^{s_1}\cap\ldots\cap f\partial D^{s_r}=\emptyset, and suppose that

rd≥(s1+s2+…+sr)+si+3rd\ge (s_1+s_2+\ldots+s_r)+s_i+3

and d≥si+3d\ge s_i+3 for each ii. If the map

fr:∂(Ds1×…×Dsr)→(Bd)r−{(x,x,…,x)∈(Bd)r ∣ x∈Bd}f^r:\partial(D^{s_1}\times\ldots\times D^{s_r})\to (B^d)^r-\{(x,x,\ldots,x)\in(B^d)^r\ |\ x\in B^d\}

extends to a continuous map of Ds1×…×DsrD^{s_1}\times\ldots\times D^{s_r}, Metastable Local Disjunction conjecture. then there is a PL map f‾:D→Bd\overline f:D\to B^d such that

f‾=fonDsr∪∂Dandf‾Ds1∩…∩f‾Dsr=∅.\overline f=f \quad\text{on}\quad D^{s_r}\cup\partial D\quad\text{and}\quad \overline fD^{s_1}\cap\ldots\cap \overline fD^{s_r}=\emptyset.

The claim is presented as one of the paper's conjectures, whose complete proof is the subject of the note; the supplied text does not establish whether it has been resolved.

References

Primary source

A. Skopenkov, “On the metastable Mabillard-Wagner conjecture”, arXiv:1702.04259 (2017).

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