Pith Number

pith:QGZFHHX2

pith:2013:QGZFHHX2FWVGZZ55TVBIEFNJ34

not attested not anchored not stored refs pending

The CLASS BL Lac sample: The Radio Luminosity Function

A. Caccianiga, M.J.M. Marcha

arxiv:1301.6550 v1 · 2013-01-28 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QGZFHHX2FWVGZZ55TVBIEFNJ34}

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	2026-05-18T01:51:57.897191Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

81b2539efa2daa6ce7bd9d428215a9df17714cd43132130380c60aec2a2ad45e

Aliases

arxiv: 1301.6550 · arxiv_version: 1301.6550v1 · doi: 10.48550/arxiv.1301.6550 · pith_short_12: QGZFHHX2FWVG · pith_short_16: QGZFHHX2FWVGZZ55 · pith_short_8: QGZFHHX2

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/QGZFHHX2FWVGZZ55TVBIEFNJ34 \
  | 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: 81b2539efa2daa6ce7bd9d428215a9df17714cd43132130380c60aec2a2ad45e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8e06fd98609a90c678276004df9bf3e744c5618b56b2148c061a3baeba1aeb6a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-01-28T14:09:27Z",
    "title_canon_sha256": "7e198374ef7b5583b506f09df28c1b7ffafa460d15aeb545db564b35fa55abf7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.6550",
    "kind": "arxiv",
    "version": 1
  }
}