Pith Number

pith:W4MGQDJB

pith:1996:W4MGQDJB6UF2XDOIWXSSDGLEHX

not attested not anchored not stored refs pending

Maxwell's theory on a post-Riemannian spacetime and the equivalence principle

Claus L\"ammerzahl, Friedrich W. Hehl (Theoretical Physics, Germany), Roland A. Puntigam, University of Cologne

arxiv:gr-qc/9607023 v3 · 1996-07-10 · 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{W4MGQDJB6UF2XDOIWXSSDGLEHX}

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	2026-05-18T01:09:17.630472Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b718680d21f50bab8dc8b5e52199643dcba668947471c03eef0684f10974931d

Aliases

arxiv: gr-qc/9607023 · arxiv_version: gr-qc/9607023v3 · doi: 10.48550/arxiv.gr-qc/9607023 · pith_short_12: W4MGQDJB6UF2 · pith_short_16: W4MGQDJB6UF2XDOI · pith_short_8: W4MGQDJB

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/W4MGQDJB6UF2XDOIWXSSDGLEHX \
  | 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: b718680d21f50bab8dc8b5e52199643dcba668947471c03eef0684f10974931d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "de6be7a6616dc21a072670438b5e7db9dc8a8c575e57708870378fdfd32ee8ba",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "1996-07-10T10:25:22Z",
    "title_canon_sha256": "fb23eb4fe1b2c524e07aad094e9fcf41c8ef5fadadcc10b99b3f99fc988d44c9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/9607023",
    "kind": "arxiv",
    "version": 3
  }
}