Pith Number

pith:O2RFWQH4

pith:2011:O2RFWQH4CGXEAJTMZMHO5GTA2H

not attested not anchored not stored refs pending

Does the speed of light depend upon the vacuum ?

F. Couchot, M. Urban, X. Sarazin

arxiv:1106.3996 v1 · 2011-06-20 · physics.gen-ph · 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{O2RFWQH4CGXEAJTMZMHO5GTA2H}

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	2026-05-18T04:19:41.760896Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

76a25b40fc11ae40266ccb0eee9a60d1e8ac3484cc22ce63f8562a91816a10c2

Aliases

arxiv: 1106.3996 · arxiv_version: 1106.3996v1 · doi: 10.48550/arxiv.1106.3996 · pith_short_12: O2RFWQH4CGXE · pith_short_16: O2RFWQH4CGXEAJTM · pith_short_8: O2RFWQH4

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/O2RFWQH4CGXEAJTMZMHO5GTA2H \
  | 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: 76a25b40fc11ae40266ccb0eee9a60d1e8ac3484cc22ce63f8562a91816a10c2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5add1768fda79b1d9172e9cd040288cf21f0e6c751680a62e38199947453cc89",
    "cross_cats_sorted": [
      "quant-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.gen-ph",
    "submitted_at": "2011-06-20T19:18:59Z",
    "title_canon_sha256": "9d57a16c487a139c009f4de8bb81fe26f3c34aaf6fbe9bed7157418c2847e2e3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1106.3996",
    "kind": "arxiv",
    "version": 1
  }
}