Pith Number

pith:HCPL4AAI

pith:1997:HCPL4AAIOJS4DELNZKF5GWBEQ2

not attested not anchored not stored refs pending

Freely falling 2-surfaces and the quasi-local energy

Keita Ikumi, Tetsuya Shiromizu

arxiv:gr-qc/9704020 v3 · 1997-04-08 · gr-qc · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HCPL4AAIOJS4DELNZKF5GWBEQ2}

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	2026-05-18T01:39:19.043028Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

389ebe00087265c1916dca8bd35824868b9587d83cd94ac439fb97432d6800c7

Aliases

arxiv: gr-qc/9704020 · arxiv_version: gr-qc/9704020v3 · doi: 10.48550/arxiv.gr-qc/9704020 · pith_short_12: HCPL4AAIOJS4 · pith_short_16: HCPL4AAIOJS4DELN · pith_short_8: HCPL4AAI

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/HCPL4AAIOJS4DELNZKF5GWBEQ2 \
  | 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: 389ebe00087265c1916dca8bd35824868b9587d83cd94ac439fb97432d6800c7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b70a63a5506004cfee291433e9b48bfaa67d75fd54550b5fa9d8598b21119a61",
    "cross_cats_sorted": [
      "hep-th"
    ],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "1997-04-08T06:14:20Z",
    "title_canon_sha256": "509e24d476c2413965c2c43eef1ac01c18835e17b5fe74213c3797dd8718e9fc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/9704020",
    "kind": "arxiv",
    "version": 3
  }
}