activity
20032026
most citedInverse spectral problem for normal matrices and a generalization of the Gauss-Lucas theorem

5 citations · 5 across the 9 of their papers we have counts for

collaborators

10 papers

cs.CL2026

Scaling Point-in-Time Language Models

Bryan Kelly, Semyon Malamud, Johannes Schwab +1

Large language models trained on unrestricted internet corpora inevitably embed information from the future, introducing lookahead bias that compromises the validity of backtests a…

stat.ML2025

Limits To (Machine) Learning

Zhimin Chen, Bryan Kelly, Semyon Malamud

Machine learning (ML) methods are highly flexible, but their ability to approximate the true data-generating process is fundamentally constrained by finite samples. We characterize…

cs.LG2025

Training NTK to Generalize with KARE

Johannes Schwab, Bryan Kelly, Semyon Malamud +1

The performance of the data-dependent neural tangent kernel (NTK; Jacot et al. (2018)) associated with a trained deep neural network (DNN) often matches or exceeds that of the full…

q-fin.ST2024

Large and Deep Factor Models

Bryan Kelly, Boris Kuznetsov, Semyon Malamud +1

We show that a deep neural network (DNN) trained to construct a stochastic discount factor (SDF) admits an additive decomposition separating nonlinear characteristic discovery from…

cs.LG2023

A Simple Algorithm For Scaling Up Kernel Methods

Teng Andrea Xu, Bryan Kelly, Semyon Malamud

The recent discovery of the equivalence between infinitely wide neural networks (NNs) in the lazy training regime and Neural Tangent Kernels (NTKs) (Jacot et al., 2018) has revived…

stat.ML2022

Deep Regression Ensembles

Antoine Didisheim, Bryan Kelly, Semyon Malamud

We introduce a methodology for designing and training deep neural networks (DNN) that we call "Deep Regression Ensembles" (DRE). It bridges the gap between DNN and two-layer neural…