Correspondence homomorphism conjecture for Suslin homology

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Let k\Bbbk be an algebraically closed field of characteristic 00, and let X,Y∈Sch/kX,Y\in \mathbf{Sch}/\Bbbk. For α∈cequi(X×kY/X,0)\alpha\in c_{\mathrm{equi}}(X\times_{\Bbbk}Y/X,0), write trα:HiS(X,Z)→HiS(Y,Z)\mathrm{tr}_{\alpha}:H_i^S(X,\mathbb{Z})\rightarrow H_i^S(Y,\mathbb{Z}) for the induced homomorphism. Here (M1) and (M2) are the properties defined earlier in the paper.

Correspondence homomorphism conjecture. (i) For any α∈cequi(X×Y/X,0)\alpha\in c_{\mathrm{equi}}(X\times Y/X,0), trα\mathrm{tr}_{\alpha} satisfies (M1). (ii) For any α∈cequi(X×X/X,0)\alpha\in c_{\mathrm{equi}}(X\times X/X,0), trα\mathrm{tr}_{\alpha} satisfies (M2).

The conjecture generalizes the corresponding theorem from homomorphisms induced by morphisms to those induced by arbitrary correspondences. It has been confirmed by Bruno Kahn in the appendix.

References

Primary source

Xiaowen Hu and with an Appendix by Bruno Kahn, “On Suslin homology with integral coefficients in characteristic zero (with an appendix by Bruno Kahn)”, arXiv:1902.00932 (2020).

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