Mean-field weight-noise invariance conjecture

From papers

Let the assumptions of Theorem~ hold, with the dynamics of (Xi(t))i[N](\bm{X}_i(t))_{i\in[N]} and (wi,j(t))i,j[N](\bm{w}_{i,j}(t))_{i,j\in[N]} governed by the SDEs with weight-noise intensity η>0\eta>0. Let (X(t),w(t))(\overline{X}(t),\overline{w}(t)) solve the original McKean–Vlasov SDEs, without the η\eta term, with initial data from the same independent-mixture sampling. Mean-field weight-noise invariance conjecture. The estimates of the article still hold; in particular, for some constant C(t)>0C(t)>0 depending on tt and the bounds in Assumptions~ and,

E[δW1,(((Xi(t))i[N],(wi,j(t))i,j[N],[N]),(X(t),w(t),(Ω×Ω^)))]C(t)logN.\mathbb{E}\bigg[\delta_{W_1,\square}\bigg(\Big((\bm{X}_{i}(t))_{i\in[N]},(\bm{w}_{i,j}(t))_{i,j\in[N]},[N]\Big),\Big(\overline{X}(t),\overline{w}(t),(\Omega\times\widehat{\Omega})\Big)\bigg)\bigg]\leq\frac{C(t)}{\sqrt{\log N}}.

The conjecture asserts that independent edge noise has no effect on the limiting McKean–Vlasov dynamics under mean-field scaling, apart from the stated finite-size error.

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Sources & referencesView supporting material

Primary source

Datong Zhou, “Non-exchangeable mean-field theory for adaptive weights: propagation of dissociatedness and graphon sampling lemma”, arXiv:2506.13587 (2025).

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