Douglas's K-homology fundamental-class conjecture for algebraic sets

Let VCmV\subseteq\mathbb{C}^{m} be an algebraic set intersecting Bm\partial\mathbb{B}^m transversally, and let II be its vanishing ideal. Set XI:=V(I)BmX_I:=V(I)\cap\partial\mathbb{B}^m. Let K\mathfrak{K} be the ideal of compact operators on II^\perp, let TI\mathfrak{T}_I be the unital CC^*-algebra generated by the compressed multiplication operators and K\mathfrak{K}, and let τI\tau_I be the extension class associated with

0KTIC(σIe)0.0\rightarrow\mathfrak{K}\hookrightarrow\mathfrak{T}_I\rightarrow C(\sigma_I^e)\rightarrow 0.

Douglas's conjecture. Conjecture A holds true, and its induced extension class τI\tau_I is identified with the fundamental class of XIX_I, namely the extension class induced by the Spinc\operatorname{Spin}^{c} Dirac operator associated with the natural Cauchy-Riemann structure of XIX_I.

The conjecture connects essential normality of Drury-Arveson quotient modules with the geometric realization of KK-homology. The supplied text states the claim in the transversal algebraic-set case but gives no resolution status.

Sources & referencesView supporting material

Primary source

Mohammad Jabbari and Xiang Tang, “Perturbations of principal submodules in the Drury-Arveson space”, arXiv:2011.05395 (2020).

Additional references

2 papers in this index state this conjecture (2020). The statement above is taken from the most recent of them; the others are arXiv:2009.10788.

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