Pith Number

pith:OOQ4U2NY

pith:2002:OOQ4U2NYRRVYC6C2PHIDGVOMIW

not attested not anchored not stored refs pending

Ultracold neutrons, quantum effects of gravity and the Weak Equivalence Principle

F.M. Nunes, O. Bertolami

arxiv:hep-ph/0204284 v3 · 2002-04-24 · hep-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OOQ4U2NYRRVYC6C2PHIDGVOMIW}

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	2026-05-18T00:36:56.932724Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

73a1ca69b88c6b81785a79d03355cc45a0308416932d9c7c8afdcb9f9fe32a3d

Aliases

arxiv: hep-ph/0204284 · arxiv_version: hep-ph/0204284v3 · doi: 10.48550/arxiv.hep-ph/0204284 · pith_short_12: OOQ4U2NYRRVY · pith_short_16: OOQ4U2NYRRVYC6C2 · pith_short_8: OOQ4U2NY

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/OOQ4U2NYRRVYC6C2PHIDGVOMIW \
  | 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: 73a1ca69b88c6b81785a79d03355cc45a0308416932d9c7c8afdcb9f9fe32a3d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "233cc49d8a3f218f40a6fccdd8e5ffcb202aff095cbd56e670bc63b70eabbc46",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "hep-ph",
    "submitted_at": "2002-04-24T14:50:58Z",
    "title_canon_sha256": "14d824641a09545e24cf24c521e5d674257b69f6af09a74756fe3291cf8f2725"
  },
  "schema_version": "1.0",
  "source": {
    "id": "hep-ph/0204284",
    "kind": "arxiv",
    "version": 3
  }
}