Homology conjecture for affine and linear fixing cycles

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Let XX be a simplicial manifold. A fixing cycle is a (3n−2)(3n-2)-cycle ϕ∈Z3n−2(Y,π∗(D))\phi\in Z_{3n-2}(Y,\pi^*({\mathcal D})) satisfying

∥π∥∗(Ωn−1⌢[ϕ])=[X],\|\pi\|_*(\Omega^{n-1}\frown[\phi])=[X],

where nn is the dimension of XX, D{\mathcal D} is its orientation presheaf, and Ω\Omega is the relevant cocycle. Fixing-cycle homology conjecture. All affine fixing cycles are homologous, and all linear fixing cycles are homologous.

Fixing cycles are designed as a combinatorial analogue of the fundamental class of the associated space arising from a smoothing. The conjecture would make the fixing-cycle contribution to the Pontrjagin-class formula independent of the chosen fixing cycle; its resolution is not specified in the supplied text.

References

Primary source

Olakunle Abawonse and Laura Anderson, “On Gelfand and MacPherson's combinatorial formula for Pontrjagin classes”, arXiv:2210.16903 (2022).

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