Pith Number

pith:XKU42A44

pith:1999:XKU42A44WQCESGOM3CQ5RO3T4A

not attested not anchored not stored refs pending

Pseudo-Riemannian Metrics in Models Based on Noncommutative Geometry

Aristophanes Dimakis, Folkert Muller-Hoissen

arxiv:gr-qc/9908022 v1 · 1999-08-06 · gr-qc · hep-th · math-ph · math.MP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XKU42A44WQCESGOM3CQ5RO3T4A}

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	2026-05-18T04:24:25.740519Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

baa9cd039cb4044919ccd8a1d8bb73e01561c709c3673ec660ec8b628889ef4c

Aliases

arxiv: gr-qc/9908022 · arxiv_version: gr-qc/9908022v1 · doi: 10.48550/arxiv.gr-qc/9908022 · pith_short_12: XKU42A44WQCE · pith_short_16: XKU42A44WQCESGOM · pith_short_8: XKU42A44

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/XKU42A44WQCESGOM3CQ5RO3T4A \
  | 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: baa9cd039cb4044919ccd8a1d8bb73e01561c709c3673ec660ec8b628889ef4c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "780ecc8234e5df9b030560441106f10c4a85736d4e0f97398852423d0e13a24c",
    "cross_cats_sorted": [
      "hep-th",
      "math-ph",
      "math.MP"
    ],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "1999-08-06T14:04:53Z",
    "title_canon_sha256": "08519395c84674ebaf65363f83a585fa6f21492f082c5baaf3ea88a073522a18"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/9908022",
    "kind": "arxiv",
    "version": 1
  }
}