Constant-term spectral-action conjecture for noncommutative tori

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Let DA\mathcal{D}_A be the fluctuated Dirac operator on a noncommutative nn-torus, and let D+A\mathcal{D}+A denote the corresponding operator on the commutative nn-torus. Consider the constant terms in their spectral actions.

Constant-term spectral-action conjecture. The constant term of the spectral action of DA\mathcal{D}_A on the noncommutative nn-torus is proportional to the constant term of the spectral action of D+A\mathcal{D}+A on the commutative nn-torus.

This conjecture compares the dimension-independent constant contribution of the spectral action in the noncommutative and commutative settings. The supplied text gives no resolution or precise proportionality factor, so the conjecture remains open.

References

Primary source

Bruno Iochum, “Spectral Geometry”, arXiv:1712.05945 (2017).

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