Pith Number

pith:RQ6ZY55V

pith:2013:RQ6ZY55VYYSDXF2S75REDHUPEH

not attested not anchored not stored refs pending

The quantum vacuum as the origin of the speed of light

Arache Djannati-Atai, Francois Couchot, Marcel Urban, Xavier Sarazin

arxiv:1302.6165 v1 · 2013-02-21 · physics.gen-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{RQ6ZY55VYYSDXF2S75REDHUPEH}

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	2026-05-18T03:22:17.052257Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8c3d9c77b5c6243b9752ff62419e8f21dc0fc913d067e3fabcfa20e77afeca09

Aliases

arxiv: 1302.6165 · arxiv_version: 1302.6165v1 · doi: 10.48550/arxiv.1302.6165 · pith_short_12: RQ6ZY55VYYSD · pith_short_16: RQ6ZY55VYYSDXF2S · pith_short_8: RQ6ZY55V

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/RQ6ZY55VYYSDXF2S75REDHUPEH \
  | 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: 8c3d9c77b5c6243b9752ff62419e8f21dc0fc913d067e3fabcfa20e77afeca09

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dde07bf9f30ecf902f81e605ac0044a5d1c2dc536f16ebc8243014381f4c7ad1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.gen-ph",
    "submitted_at": "2013-02-21T10:13:00Z",
    "title_canon_sha256": "8a0de914549e3555e24be3ebb932e3e4407ddb32e2216f42ab9456b38ea4e6bf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.6165",
    "kind": "arxiv",
    "version": 1
  }
}