Pith Number

pith:IE33TVTG

pith:2026:IE33TVTGZ3HWAYYYU2NXD5E5BA

not attested not anchored not stored refs pending

Similar Models Learn Differently: Final-Window Pretraining Shapes Post-Training Beyond SFT

Andrea Cavallaro, Cen Lu, Yung-Chen Tang

arxiv:2607.25063 v1 · 2026-07-27 · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IE33TVTGZ3HWAYYYU2NXD5E5BA}

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	2026-07-29T00:25:00.761073Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4137b9d666cecf606318a69b71f49d081560e635822f63c9e6250e307212bc05

Aliases

arxiv: 2607.25063 · arxiv_version: 2607.25063v1 · doi: 10.48550/arxiv.2607.25063 · pith_short_12: IE33TVTGZ3HW · pith_short_16: IE33TVTGZ3HWAYYY · pith_short_8: IE33TVTG

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/IE33TVTGZ3HWAYYYU2NXD5E5BA \
  | 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: 4137b9d666cecf606318a69b71f49d081560e635822f63c9e6250e307212bc05

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7d90de8c3a3fd590a06d33c812c5f83828699d711f4ec7860846129e03a16596",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2026-07-27T20:46:29Z",
    "title_canon_sha256": "049428ccd5008507c0d9966e3ab44e63c8e9d33f13815190bb67f93b7666e299"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.25063",
    "kind": "arxiv",
    "version": 1
  }
}