Composition-dependence conjecture for maps between resonance complexes

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For every n≥1n\geq 1, let Res⁡ λ\operatorname{Res}\,\lambda denote the resonance set associated with a number partition λ\lambda of length nn. If Res⁡ λ~≥Res⁡ λ\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.

References

Primary source

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

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