Homotopy equivalence conjecture for ascending and descending links

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Let XX be a complex stratified space with a stratification S{\cal S}, let I{\cal I} be the set of all closed unions of strata of S{\cal S} ordered by inclusion, and let LV±(p)L^\pm_V(p) be the ascending and descending links at a point pp, with sets of cells LV±(p){\cal L}^\pm_V(p). Let ff be the stratified Morse function, let Ef±(p)E^\pm_f(p) be the corresponding upper and lower boundaries of the local Morse data, and let

lV±(p):LV±(p)→Ef±(p)l^\pm_V(p):L^\pm_V(p)\to E^\pm_f(p)

be the natural inclusion maps.

Homotopy equivalence conjecture. The maps lV±(p)l^\pm_V(p) are homotopy equivalences of I{\cal I}-filtered spaces.

This conjecture strengthens the preceding conjecture, which asserts that the ascending and descending links have filtered CW-complex models with corresponding cells and homotopy equivalences. It would identify the links directly with the boundary pieces of the local Morse data, relating the geometric ascending and descending sets to a central construction in stratified Morse theory. The supplied text gives no evidence of resolution.

References

Primary source

Mikhail Grinberg, “Dimensions of the Ascending and Descending Sets in Complex Stratified Morse Theory”, arXiv:1005.4488 (2010).

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