Teh's filtration conjecture for real varieties

Let XX be a smooth projective real variety. For 0qn0\leq q\leq n, let RTqHn(X)RT_qH_n(X) denote the image of the generalized cycle map from reduced Lawson homology, and let N2nqHn(X(R);Z/2)N_{2n-q}H_n(X(\mathbb{R});\mathbb{Z}/2) be the corresponding niveau filtration step.

Teh's conjecture.

RTqHn(X)N2nqHn(X(R);Z/2)RT_qH_n(X)\subseteq N_{2n-q}H_n(X(\mathbb{R});\mathbb{Z}/2)

and moreover

RTqHn(X)=N2nqHn(X(R);Z/2).RT_qH_n(X)=N_{2n-q}H_n(X(\mathbb{R});\mathbb{Z}/2).

The conjecture proposes that the topological filtration coming from generalized cycle maps agrees with the niveau filtration on the Borel-Moore homology of real points. The second part is false because the ss-maps are not always surjective.

Sources & referencesView supporting material

Primary source

Jeremiah Heller and Mircea Voineagu, “Remarks on filtrations of the homology of real varieties”, arXiv:1110.1836 (2011).

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