Pith Number

pith:JY3HRKDC

pith:2001:JY3HRKDCUMA7KKXG2R34FFCGH6

not attested not anchored not stored refs pending

Generally covariant Fresnel equation and the emergence of the light cone structure in linear pre-metric electrodynamics

Friedrich W. Hehl, Guillermo F. Rubilar, Yuri N. Obukhov

arxiv:gr-qc/0109012 v2 · 2001-09-04 · gr-qc · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JY3HRKDCUMA7KKXG2R34FFCGH6}

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.

Cited by

1 paper in Pith

Covariant Constructive Gravity

Receipt and verification

First computed	2026-07-04T16:26:57.216759Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4e3678a862a301f52ae6d477c294463f9d7232ebf57b24da66d0cc4f540e9083

Aliases

arxiv: gr-qc/0109012 · arxiv_version: gr-qc/0109012v2 · doi: 10.48550/arxiv.gr-qc/0109012 · pith_short_12: JY3HRKDCUMA7 · pith_short_16: JY3HRKDCUMA7KKXG · pith_short_8: JY3HRKDC

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/JY3HRKDCUMA7KKXG2R34FFCGH6 \
  | 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: 4e3678a862a301f52ae6d477c294463f9d7232ebf57b24da66d0cc4f540e9083

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "04249d4749c60579e679013eb5713dc866dfbd06676dd1307ef72966a14cd1ed",
    "cross_cats_sorted": [
      "hep-th"
    ],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "2001-09-04T15:38:48Z",
    "title_canon_sha256": "8bd6afceb4adfeb2868050f7827b42a52717e1c58094ff64fcf6663df4d335a5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/0109012",
    "kind": "arxiv",
    "version": 2
  }
}