Pith Number

pith:DRO63STM

pith:2025:DRO63STMEHTCSREU75U4FULAW7

not attested not anchored not stored refs pending

When the Past Misleads: Rethinking Training Data Expansion Under Temporal Distribution Shifts

Chengyuan Yao, Christopher Brooks, Rene F. Kizilcec, Renzhe Yu, Yunxuan Tang

arxiv:2509.01060 v2 · 2025-09-01 · cs.CY

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DRO63STMEHTCSREU75U4FULAW7}

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	2026-07-05T12:05:04.176637Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1c5dedca6c21e6294494ff69c2d160b7d6dd1a416d18148a93978b514b135537

Aliases

arxiv: 2509.01060 · arxiv_version: 2509.01060v2 · doi: 10.48550/arxiv.2509.01060 · pith_short_12: DRO63STMEHTC · pith_short_16: DRO63STMEHTCSREU · pith_short_8: DRO63STM

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/DRO63STMEHTCSREU75U4FULAW7 \
  | 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: 1c5dedca6c21e6294494ff69c2d160b7d6dd1a416d18148a93978b514b135537

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2ae223dea026307654eb443ddcdfc2325db7bc6da65d15917b4b52115bee63dc",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "cs.CY",
    "submitted_at": "2025-09-01T02:05:39Z",
    "title_canon_sha256": "968c9ed5dd76c56231dedd9be2b6775a6ee4de6dcb22ef57407ce616c4877a2f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2509.01060",
    "kind": "arxiv",
    "version": 2
  }
}