The characterization conjecture for local LS-category and cocategory
The characterization conjecture for local LS-category and cocategory
Let be a space and let . Define when has Lusternik–Schnirelmann category at most and admits an open cover such that each map is null homotopic for distinct . Dually, define when has Lusternik–Schnirelmann cocategory at most and satisfies the corresponding co-cover condition. Let and denote the second iterates of the covariant and contravariant approximation constructions on the identity functor. Characterization conjecture. The following equivalences should hold: (1) has if and only if the map has a section; (2) has if and only if is a retract of . These would characterize the local LS invariants through the second stages of the dual Goodwillie constructions; the source presents them as a conjectural characterization and gives no resolution.
Sources & referencesView supporting material
Primary source
Rosona Eldred, “Goodwillie Calculus via Adjunction and LS Cocategory”, arXiv:1209.2384 (2015).
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