Conjectural presentation of the first-order calculus for the Kronecker foliation spectral triple

From papers

Let \cA=C(T2)R\cA=C^\infty(\mathbb{T}^2)\rtimes\mathbb{R}, with generators u1,u2u_1,u_2 for the torus part and vtv_t for the crossed-product action, and let DD be the Dirac-type operator defining the spectral triple. Let ΩD1(\cA)\Omega_D^1(\cA) denote its first-order differential bimodule. First-order-calculus conjecture. The bimodule ΩD1(\cA)\Omega_D^1(\cA) is generated by du1du_1 and du2du_2, subject precisely to the relations

vtdu1=eiatdu1vt,vtdu2=eibtdu2vt.v_tdu_1=e^{iat}du_1v_t,\qquad v_tdu_2=e^{ibt}du_2v_t.

This gives an explicit proposed description of the first-order calculus after the paper explains that no further relations of the relevant type were derived. Its status is not resolved in the supplied text.

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Primary source

R. Matthes, O. Richter and G. Rudolph, “Spectral triples and differential calculi related to the Kronecker foliation”, arXiv:math-ph/0201066 (2002).

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