Pith Number

pith:Z7ANYAMF

pith:1998:Z7ANYAMF5TJPKP7G27MRX6IMJ7

not attested not anchored not stored refs pending

Chronology Protection and Non-Naked Singularity

Akihiro Ishibashi, Kengo Maeda, Makoto Narita

arxiv:gr-qc/9803020 v1 · 1998-03-05 · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Z7ANYAMF5TJPKP7G27MRX6IMJ7}

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	2026-05-18T04:17:52.508661Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cfc0dc0185ecd2f53fe6d7d91bf90c4feab31d02efee690a17501825e4fb42f9

Aliases

arxiv: gr-qc/9803020 · arxiv_version: gr-qc/9803020v1 · doi: 10.48550/arxiv.gr-qc/9803020 · pith_short_12: Z7ANYAMF5TJP · pith_short_16: Z7ANYAMF5TJPKP7G · pith_short_8: Z7ANYAMF

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/Z7ANYAMF5TJPKP7G27MRX6IMJ7 \
  | 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: cfc0dc0185ecd2f53fe6d7d91bf90c4feab31d02efee690a17501825e4fb42f9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ca6473e996d7dc7ede6c4f77368453ea9192a83bf6e91e6bd8b291f5afa00541",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "1998-03-05T08:18:03Z",
    "title_canon_sha256": "2a253fba656f0f8c90bd438f95168a0ea2bf0af27740a0470b768268b0c2dfef"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/9803020",
    "kind": "arxiv",
    "version": 1
  }
}