Pith Number

pith:QA7YQ5M6

pith:2012:QA7YQ5M65ZMO3REFYXAC2XA2NN

not attested not anchored not stored refs pending

Quantum superpositions of the speed of light

Sabine Hossenfelder

arxiv:1207.1002 v1 · 2012-07-04 · gr-qc · hep-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{QA7YQ5M65ZMO3REFYXAC2XA2NN}

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	2026-05-18T03:44:23.884233Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

803f88759eee58edc485c5c02d5c1a6b4cf0dcae7d0fb483e9a136e782a08f00

Aliases

arxiv: 1207.1002 · arxiv_version: 1207.1002v1 · doi: 10.48550/arxiv.1207.1002 · pith_short_12: QA7YQ5M65ZMO · pith_short_16: QA7YQ5M65ZMO3REF · pith_short_8: QA7YQ5M6

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/QA7YQ5M65ZMO3REFYXAC2XA2NN \
  | 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: 803f88759eee58edc485c5c02d5c1a6b4cf0dcae7d0fb483e9a136e782a08f00

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7d0cda21084ccecc5e0d6ec854b3ec5592ebc0de577deddaf7b78040385b0ec7",
    "cross_cats_sorted": [
      "hep-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2012-07-04T14:50:51Z",
    "title_canon_sha256": "aed45aaa5cc553a4c3ba87ed8ccbee28d6ceaec304e1107b31ff87bc4933314e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.1002",
    "kind": "arxiv",
    "version": 1
  }
}