Degree-sensitive averaged exponential-sum conjecture

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Let J⊂N≥1J\subset\mathbb{N}_{\geq1} be finite and non-empty. For each i∈Ji\in J, let rir_i be positive, let fij∈OK[x1,…,xn]f_{ij}\in\mathcal{O}_K[x_1,\dots,x_n] be non-constant with deg⁡(fij)=i\operatorname{deg}(f_{ij})=i, and set

r=∑i∈Jri,I=∑i∈J,1≤j≤ri(fij).r=\sum_{i\in J}r_i,\qquad \mathcal{I}=\sum_{i\in J,1\leq j\leq r_i}(f_{ij}).

Assume IK≠(1)\mathcal{I}_K\neq(1), and let Z⊂AOKnZ\subset\mathbb{A}^n_{\mathcal{O}_K} be a subscheme. Define σ0((fij))\sigma_0((f_{ij})) as in the preceding degree-sensitive setup. Degree-sensitive averaged exponential-sum conjecture. There exist a positive constant cc and an integer MM such that, for all L∈L~K,ML\in\widetilde{\mathcal{L}}_{K,M} and all m≥2m\geq2,

∣EL,Z,I(r)(m)∣≤cmn+r−1qL−mσ0((fij)).\left|E_{L,Z,\mathcal{I}}^{(r)}(m)\right|\leq c m^{n+r-1}q_L^{-m\sigma_0((f_{ij}))}.

This conjecture strengthens the preceding averaged estimate by replacing the motivic oscillation index with the explicit degree-sensitive threshold. The source studies it, but does not state that it is proved in this generality.

References

Primary source

Kien Huu Nguyen, “Exponential sums and motivic oscillation index of arbitrary ideals and their applications”, arXiv:2305.19732 (2025).

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