Pith Number

pith:IIKTGBPE

pith:2026:IIKTGBPEY4T3RMIYR5KAH4MUBR

not attested not anchored not stored refs pending

When to Retrain after Drift: A Data-Only Test of Post-Drift Data Size Sufficiency

Ren Fujiwara, Yasuko Matsubara, Yasushi Sakurai

arxiv:2603.09024 v2 · 2026-03-09 · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IIKTGBPEY4T3RMIYR5KAH4MUBR}

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	2026-05-21T02:05:00.604480Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

42153305e4c727b8b1188f5403f1940c7292f534abfc29459dd8c94972ea7926

Aliases

arxiv: 2603.09024 · arxiv_version: 2603.09024v2 · doi: 10.48550/arxiv.2603.09024 · pith_short_12: IIKTGBPEY4T3 · pith_short_16: IIKTGBPEY4T3RMIY · pith_short_8: IIKTGBPE

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/IIKTGBPEY4T3RMIYR5KAH4MUBR \
  | 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: 42153305e4c727b8b1188f5403f1940c7292f534abfc29459dd8c94972ea7926

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ff50d49664207aacae23e0e371df838d4b9337a8bfcc952f91f8db8478e415b3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2026-03-09T23:43:56Z",
    "title_canon_sha256": "6f24506e8350ffe409ffa6728fa9eda09083a786aeac816e9ff4e564aaec40de"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2603.09024",
    "kind": "arxiv",
    "version": 2
  }
}