Pith Number

pith:7IYCH7IO

pith:2013:7IYCH7IODAHOI723BXVT5H2WGM

not attested not anchored not stored refs pending

Dark Radiation after Planck

Eleonora Di Valentino, Martina Gerbino, Najla Said

arxiv:1304.6217 v1 · 2013-04-23 · astro-ph.CO · gr-qc · hep-ph · 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{7IYCH7IODAHOI723BXVT5H2WGM}

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	2026-05-18T03:16:19.726228Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fa3023fd0e180ee47f5b0deb3e9f56332e574506d5787ce2407cf7223db9d695

Aliases

arxiv: 1304.6217 · arxiv_version: 1304.6217v1 · doi: 10.48550/arxiv.1304.6217 · pith_short_12: 7IYCH7IODAHO · pith_short_16: 7IYCH7IODAHOI723 · pith_short_8: 7IYCH7IO

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/7IYCH7IODAHOI723BXVT5H2WGM \
  | 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: fa3023fd0e180ee47f5b0deb3e9f56332e574506d5787ce2407cf7223db9d695

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dacca1e8c05f3ec232553c8b71dcb6db347051af93220694010aaf3522c55b64",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-ph",
      "hep-th"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-04-23T10:12:10Z",
    "title_canon_sha256": "47f2341fa68a9351e8a2e92ec90a32979d124912e537deaafb5ba91184b19cf3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.6217",
    "kind": "arxiv",
    "version": 1
  }
}