Precise large deviations through a uniform Tauberian theorem
Pith reviewed 2026-05-23 23:13 UTC · model grok-4.3
The pith
A uniform Tauberian theorem for Laplace-Stieltjes transforms establishes large deviation principles for random variables attracted to spectrally positive stable distributions.
A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.
Core claim
By proving a uniform Tauberian theorem for Laplace-Stieltjes transforms we derive a large deviation principle for families of random variables belonging to the basin of attraction of spectrally positive stable distributions; the method applies directly to cases beyond the reach of existing techniques and reveals the role of the characteristic function when Cramér's condition fails.
What carries the argument
Uniform Tauberian theorem for Laplace-Stieltjes transforms, which supplies uniform asymptotic control on the tail behavior from transform data under regular variation.
If this is right
- Large deviations hold for random walks whose increments have long-ranged memory kernels.
- Large deviations hold for randomly stopped sums even when the stopping time has infinite mean or is not concentrated around its expectation.
- The characteristic function governs the rate function once Cramér's condition is dropped.
- All such results sit inside a single regular-variation framework.
Where Pith is reading between the lines
- The same uniform Tauberian device may produce moderate-deviation principles or local limit theorems under only minor extra assumptions.
- The approach could be tested on risk processes or storage models whose input has heavy tails and long memory.
- It offers a route to large deviations for Markov chains or renewal processes whose return times are regularly varying.
Load-bearing premise
The random variables belong to the basin of attraction of spectrally positive stable distributions and obey the regular-variation conditions that make the uniform Tauberian theorem applicable.
What would settle it
An explicit family of random variables in the stable basin whose empirical large-deviation rate function differs from the one obtained via the uniform Tauberian route.
read the original abstract
We derive a large deviation principle for families of random variables in the basin of attraction of spectrally positive stable distributions by proving a uniform version of the Tauberian theorem for Laplace-Stieltjes transforms. The main advantage of this method is that it can be easily applied to cases that are beyond the reach of the techniques currently used in the literature. Notable examples include large deviations for random walks with long-ranged memory kernels, as well as for randomly stopped sums where the random time $\mathrm N$ is either not concentrated around its expectation or has an infinite mean. The method reveals the role of the characteristic function when Cram\'er's condition is violated and provides a unified approach within regular variation.
Editorial analysis
A structured set of objections, weighed in public.
Referee Report
Summary. The paper claims to derive a large deviation principle for families of random variables in the basin of attraction of spectrally positive stable distributions by proving a uniform version of the Tauberian theorem for Laplace-Stieltjes transforms. The approach is positioned as extending to long-memory random walks and randomly stopped sums (with stopping time N not concentrated around its mean or having infinite mean), while revealing the role of the characteristic function when Cramér's condition is violated and unifying results under regular variation.
Significance. If the uniform Tauberian theorem is established correctly, the result supplies a new method for precise LDPs in regimes beyond standard techniques, such as long-range dependence or infinite-mean stopping times. This could strengthen the toolkit for regular-variation-based large deviations in probability theory.
minor comments (2)
- The abstract mentions applications to long-ranged memory kernels and randomly stopped sums but does not indicate where in the manuscript the corresponding theorems are stated; adding explicit theorem numbers or section references would improve readability.
- Notation for the Laplace-Stieltjes transform and the uniform Tauberian statement could be introduced with a dedicated preliminary section to aid readers unfamiliar with the precise formulation.
Simulated Author's Rebuttal
We thank the referee for their positive summary, significance assessment, and recommendation to accept the manuscript. No major comments were raised in the report.
Circularity Check
No significant circularity detected
full rationale
The paper derives an LDP for random variables in the basin of attraction of spectrally positive stable laws by first proving a uniform Tauberian theorem for Laplace-Stieltjes transforms under regular variation. This theorem is presented as an independent analytic result whose proof is the central contribution; the LDP then follows by direct application to the stated class of processes (long-memory walks, randomly stopped sums). No equation reduces the target LDP to a fitted parameter, no self-citation supplies a load-bearing uniqueness theorem, and the derivation chain is not shown to be equivalent to its inputs by construction. The conditions (regular variation, spectral positivity) are external to the claimed result and are standard in the literature.
Axiom & Free-Parameter Ledger
axioms (1)
- domain assumption Random variables lie in the basin of attraction of spectrally positive stable distributions under regular variation.
Reference graph
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