Composition-dependence conjecture for maps between resonance complexes

For every n1n\geq 1, let Resλ\operatorname{Res}\,\lambda denote the resonance set associated with a number partition λ\lambda of length nn. If Resλ~Resλ\operatorname{Res}\,\tilde\lambda\geq\operatorname{Res}\,\lambda, choose compositions α~\tilde\alpha and α\alpha of types λ~\tilde\lambda and λ\lambda, respectively, whose resonance sets satisfy the required inclusion. This choice induces a map

γ(α~,α):δλ~δλ\gamma(\tilde\alpha,\alpha):\delta_{\tilde\lambda}\rightarrow\delta_\lambda

and hence a homology map

γ(α~,α):H~(δλ~)H~(δλ).\gamma(\tilde\alpha,\alpha)_*:\widetilde H_*(\delta_{\tilde\lambda})\rightarrow\widetilde H_*(\delta_\lambda).

Composition-dependence conjecture. The isomorphism type of γ(α~,α)\gamma(\tilde\alpha,\alpha)_* depends not only on the actual number partitions λ~\tilde\lambda and λ\lambda, rather than their sets of resonances, but even on the choice of the pair of compositions α\alpha and α~\tilde\alpha. Thus the induced homology map is not determined solely by the resonance data or by the number partitions.

Sources & referencesView supporting material

Primary source

Dmitry N. Kozlov, “Topology of spaces of hyperbolic polynomials and combinatorics of resonances”, arXiv:math/0111166 (2001).

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