Pith Number

pith:DGVPEG4O

pith:2010:DGVPEG4OUCQW2DZUS26CXU4HVW

not attested not anchored not stored refs pending

4C 02.27: what is inside a double-double radio quasar?

S. Frey (FOMI SGO), Z. Paragi (JIVE)

arxiv:1012.2992 v1 · 2010-12-14 · 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{DGVPEG4OUCQW2DZUS26CXU4HVW}

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	2026-05-18T04:33:18.898881Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

19aaf21b8ea0a16d0f3496bc2bd387ad90338c31476989695c09a9e8a34ea286

Aliases

arxiv: 1012.2992 · arxiv_version: 1012.2992v1 · doi: 10.48550/arxiv.1012.2992 · pith_short_12: DGVPEG4OUCQW · pith_short_16: DGVPEG4OUCQW2DZU · pith_short_8: DGVPEG4O

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/DGVPEG4OUCQW2DZUS26CXU4HVW \
  | 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: 19aaf21b8ea0a16d0f3496bc2bd387ad90338c31476989695c09a9e8a34ea286

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8e04da2195b8232db5f0e09738d25bfc343ea499e06f327dce3241692a47db64",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-12-14T10:58:10Z",
    "title_canon_sha256": "14732fcef8accdaee648adff61ac421de2ff04782cb44e25df5b4e5c8305fade"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1012.2992",
    "kind": "arxiv",
    "version": 1
  }
}