ML: Batching

Machine-learning ideas tagged Batching in the ML taxonomy of the Math2NN corpus.

△ Mechanism confirmed, baseline not beaten 2026

Tau-leaped parallel discrete Hamiltonian sampler

Approximate the exact event-by-event lifted sampler by drawing independent Poisson jump counts over a short interval and applying compatible discrete moves in parallel. This converts sequential neighbor events into batched GPU-friendly updates while retaining the Hamiltonian rate structure; the step size controls the error-versus-throughput tradeoff.

Useful7/10
Difficulty5/10
Novelty8/10
Paper: Hamiltonian dynamics for sampling on discrete spaces arXiv:2608.17961
✗ Failed on benchmark 2026

Scrambled Sobol Diffusion Ensembles

Use Owen-scrambled Sobol points instead of independent Gaussian seeds for batched diffusion sampling, mapping each cube point through the component-wise inverse Gaussian CDF and the model's probability-flow ODE. Estimate ensemble expectations with importance weights computed from the target-to-proposal density ratio, so the estimator remains valid despite finite-step and learned-score transport errors.

Useful7/10
Difficulty6/10
Novelty7/10
Paper: Diffusion Quasi-Monte Carlo arXiv:2608.11055
△ Mechanism confirmed, baseline not beaten 2026

Pipelined bounded-staleness gradient coding

Replace synchronous replicated-gradient computation with a bounded-staleness stream: at optimizer step t, aggregate one gradient for each data partition, using the newest completed evaluation even if it was computed at an earlier model version. Replicated partition placement makes the aggregate robust to stragglers, while pipelining ensures that each worker computes only one partition gradient per step.

Useful7/10
Difficulty6/10
Novelty6/10
Paper: Pipelined Gradient Coding arXiv:2607.20739
✗ Mechanism failed 2026

Unassembled Adaptive Cell Neural Network

Represent every mesh interface degree of freedom by one feature copy per incident cell, and apply local neural blocks directly to these cell tensors. Enforce inter-cell consistency with valence-weighted averaging only after selected layers or hierarchy transitions, avoiding repeated construction of a global sparse graph or assembled feature vector. This is suited to adaptive quadtrees, octrees, and finite-element neural operators.

Useful6/10
Difficulty5/10
Novelty7/10
Paper: Coalesced Matrix-Free Geometric Multigrid on Persistent Cell-Wise Storage arXiv:2607.03413