Weighted Erdős–Burgess equality conjecture for finite principal ideal rings

Let RR be a finite principal ideal ring with identity, and let IΨ(SR)\boldsymbol{I}_{\Psi}(\mathcal{S}_R), DΨ(U(R))\boldsymbol{D}_{\Psi}(\mathop{\rm U}(R)), Ind(P){\rm Ind}(P), and St(P){\rm St}(P) denote the weighted Erdős–Burgess constant, weighted Davenport constant, index of a prime ideal, and stabilizer of that ideal under the action of Ψ\Psi, respectively. Let Ψ\Psi be a subgroup of the group Aut(R){\rm Aut}(R).

Weighted Erdős–Burgess equality conjecture.

IΨ(SR)=DΨ(U(R))+Pspec(R)T(Ind(P); ΨSt(P))ΨSt(P).{\rm I}_{\Psi}(\mathcal{S}_R)={\rm D}_{\Psi}({\rm U}(R))+\sum\limits_{P\in \operatorname{spec}(R)} \frac {T\left({\rm Ind}(P);\ \frac{|\Psi|}{|{\rm St}(P)|}\right)} {\frac{|\Psi|}{|{\rm St}(P)|}}.

This conjecture asserts an exact formula for the weighted Erdős–Burgess constant of finite principal ideal rings, refining the preceding lower-bound conjecture. The source gives no evidence of resolution, so its status remains open.

Sources & referencesView supporting material

Primary source

Guoqing Wang, “Weighted Erdős-Burgess and Davenport constant in commutative rings”, arXiv:2202.11887 (2022).

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