Homotopy CW-complex conjecture for ascending and descending links
In the situation of Theorem
, let $L^-_V(p)$ and $L^+_V(p)$ be the descending and ascending links, let ${\cal I}$ be the poset of closed unions of strata of ${\cal S}$, and let ${\cal L}^{\pm}_V(p)$ denote the corresponding sets of cells. **Homotopy CW-complex conjecture.** There exist CW-complexes $K^-_V(p)$ and $K^+_V(p)$, with cell sets ${\cal K}^-_V(p)$ and ${\cal K}^+_V(p)$, together with dimension-preserving bijectionsk^-:{\cal K}^-_V(p)\to{\cal L}^-_V(p),\qquad k^+:{\cal K}^+_V(p)\to{\cal L}^+_V(p),
such that these bijections make the CW-complexes ${\cal I}$-filtered spaces and there are homotopy equivalences of ${\cal I}$-filtered spacesh^-_V(p):K^-_V(p)\to L^-_V(p),\qquad h^+_V(p):K^+_V(p)\to L^+_V(p).
, analogous to the classical Morse-theoretic result that a manifold is homotopy equivalent to a CW-complex whose cells correspond to critical points. The conjecture is presented as a strengthening of the earlier informal claim and is intended to provide filtered homotopy models for both links.
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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