Pith Number

pith:M2QKQ4QB

pith:1999:M2QKQ4QBTNA3B5FKOJ2NSE4CRZ

not attested not anchored not stored refs pending

Topology change and context dependence

Mark J Hadley

arxiv:gr-qc/9905061 v1 · 1999-05-18 · gr-qc · quant-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{M2QKQ4QBTNA3B5FKOJ2NSE4CRZ}

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	2026-07-04T14:26:16.509767Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

66a0a872019b41b0f4aa7274d913828e7bd698c6fb398bec073b6a3c951f6a45

Aliases

arxiv: gr-qc/9905061 · arxiv_version: gr-qc/9905061v1 · doi: 10.48550/arxiv.gr-qc/9905061 · pith_short_12: M2QKQ4QBTNA3 · pith_short_16: M2QKQ4QBTNA3B5FK · pith_short_8: M2QKQ4QB

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/M2QKQ4QBTNA3B5FKOJ2NSE4CRZ \
  | 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: 66a0a872019b41b0f4aa7274d913828e7bd698c6fb398bec073b6a3c951f6a45

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cef526d16eef4b30cfa6ede977cd524092bb60b79fa51db46edb166fa92406a0",
    "cross_cats_sorted": [
      "quant-ph"
    ],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "1999-05-18T11:32:26Z",
    "title_canon_sha256": "a21170eba36307cf5b51eccce1aed41c556c5f226594cb449d84d4d013c34090"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/9905061",
    "kind": "arxiv",
    "version": 1
  }
}