Pith Number

pith:GMKFNNXD

pith:2025:GMKFNNXDP5RWKFLE6GFOGVXQBC

not attested not anchored not stored refs pending

Optimizing Pre-Training Data Mixtures with Mixtures of Data Expert Models

Alekh Agarwal, Kristina Toutanova, Lior Belenki, Tianze Shi

arxiv:2502.15950 v1 · 2025-02-21 · cs.LG · cs.CL

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GMKFNNXDP5RWKFLE6GFOGVXQBC}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-05T10:18:18.907222Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

331456b6e37f63651564f18ae356f0088781b6f0517184238f6b841166f3054d

Aliases

arxiv: 2502.15950 · arxiv_version: 2502.15950v1 · doi: 10.48550/arxiv.2502.15950 · pith_short_12: GMKFNNXDP5RW · pith_short_16: GMKFNNXDP5RWKFLE · pith_short_8: GMKFNNXD

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/GMKFNNXDP5RWKFLE6GFOGVXQBC \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 331456b6e37f63651564f18ae356f0088781b6f0517184238f6b841166f3054d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f0722d6de25663e7d09d87db38c7b273d1dfd257c9867c301967e7f4eb221f2e",
    "cross_cats_sorted": [
      "cs.CL"
    ],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2025-02-21T21:27:48Z",
    "title_canon_sha256": "81d174b60ba1bed421b79ed69dab96b2325952fb842b6e881a4991ed5157b435"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2502.15950",
    "kind": "arxiv",
    "version": 1
  }
}