_index.org

overfitting

Last edited: October 10, 2025

consider something like a polynomial interpolation:

Interpolating polynomial (or most ML models in general) are smooth, and so interpolating between points will result in “overshooting” regional points and “bouncing around”

…as a function of parameters

At a fixed dataset, just increasing the number of parameters will increase

SU-CS229 OCT062025

Last edited: October 10, 2025

Key Sequence

Notation

New Concepts

Important Results / Claims

Questions

Interesting Factoids

Decisions.jl

Last edited: October 10, 2025

A general formulation of decision networks; track:

  1. track how distributions affect each other (i.e. generalize your problem into a Bayes Net)
  2. apply transformation of the edges to your new problem type structure
  3. transform back into your new formulation’s solver
  4. solve

Limited Samples and Infinite Compute

Last edited: October 10, 2025

One-Liner

“If you have infinite compute but limited samples, how do you pretrain?”

Novelty

  • closed-form best approach which reduces loss given the current data budget

Notable Methods

Outline

  • Takes 200 million tokens, 300 million parameters, from a corpus
  • Measure validation loss
  • Vary training recipes

regularized parameter scaling

Stick in some more weight decay: more parameters, more weight decay

ModelWDK
150M0.8
300M1.6
600M3.2
1.4B3.2

ensembling

Train a bunch of seperate models (i.e. with random shuffles?) and then parameter merge; different initialization, etc.

op

Last edited: October 10, 2025