Pith Number

pith:G7GC2AZB

pith:2004:G7GC2AZBU2RU5LYPL2JAOPWJQ5

not attested not anchored not stored refs pending

Is the Lorentz signature of the metric of spacetime electromagnetic in origin?

Friedrich W. Hehl, Yakov Itin

arxiv:gr-qc/0401016 v1 · 2004-01-06 · gr-qc · hep-th · physics.class-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{G7GC2AZBU2RU5LYPL2JAOPWJQ5}

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	2026-05-18T01:39:22.701262Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

37cc2d0321a6a34eaf0f5e92073ec9875cb7481d56a1ecf3829e1e62384ea53f

Aliases

arxiv: gr-qc/0401016 · arxiv_version: gr-qc/0401016v1 · doi: 10.48550/arxiv.gr-qc/0401016 · pith_short_12: G7GC2AZBU2RU · pith_short_16: G7GC2AZBU2RU5LYP · pith_short_8: G7GC2AZB

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/G7GC2AZBU2RU5LYPL2JAOPWJQ5 \
  | 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: 37cc2d0321a6a34eaf0f5e92073ec9875cb7481d56a1ecf3829e1e62384ea53f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f7b45d0452cb20dbba6a40fd77106246597eccf857b9d334dd1583816422b0a2",
    "cross_cats_sorted": [
      "hep-th",
      "physics.class-ph"
    ],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "2004-01-06T18:58:08Z",
    "title_canon_sha256": "d5ebadc0d653b7906e6cdf16c59e7b3ae2075b7cade54c3274511d6209f9c319"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/0401016",
    "kind": "arxiv",
    "version": 1
  }
}