Discrete distributions and statistical mechanics of small systems

arXiv:2607.18968 2026 Regularization 1 ideas extracted · analyzed Aug 30, 2026

What the math gives to ML

The paper provides a constructive renormalization mechanism for nonnegative integer-valued distributions: thinning independent copies and summing them produces a semigroup whose fixed points are discrete-stable laws. Its transferable asset is a scale-consistency condition on count statistics, with the probability generating function predicting how aggregation changes the distribution, mean, variance, and tail behavior. A concrete neural-network use is to regularize stochastic routing or adaptive-computation counts so that their statistics remain predictable when batch size, microbatching, or stream duration changes. This is most promising for sparse mixture-of-experts routing, where uncontrolled count fluctuations cause capacity overflow and unstable expert utilization.

Ideas from this paper

Unverified 2026

Discrete-Stable Routing Renormalization

Add a scale-consistency regularizer to stochastic MoE or adaptive-computation routing counts. The router is trained so that aggregating independently routed microbatches produces the same normalized count law predicted by the discrete-stable renormalization fixed point, reducing sensitivity to batch size and stream length while allowing heavy-tailed but controlled expert demand.

Useful6/10
Difficulty6/10
Novelty8/10
Paper: Discrete distributions and statistical mechanics of small systems arXiv:2607.18968