Pith Number

pith:7YQQN7ZV

pith:2009:7YQQN7ZVT7DDNWD6QQOKXKGTE4

not attested not anchored not stored refs pending

Nature of X-shaped sources

A.P. Lobanov, A.P. Rao, C.C. Cheung, D.V. Lal, J.A. Zensus, M.J. Hardcastle, R.P. Kraft, S. Bhatnagar

arxiv:0904.2725 v1 · 2009-04-17 · 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{7YQQN7ZVT7DDNWD6QQOKXKGTE4}

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	2026-07-04T15:41:24.057721Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fe2106ff359fc636d87e841caba8d32723f3831bc7cbae795ef7416679052251

Aliases

arxiv: 0904.2725 · arxiv_version: 0904.2725v1 · doi: 10.48550/arxiv.0904.2725 · pith_short_12: 7YQQN7ZVT7DD · pith_short_16: 7YQQN7ZVT7DDNWD6 · pith_short_8: 7YQQN7ZV

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/7YQQN7ZVT7DDNWD6QQOKXKGTE4 \
  | 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: fe2106ff359fc636d87e841caba8d32723f3831bc7cbae795ef7416679052251

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "88eae3a4be95eb2fa50ca665e052317059092fa53f72567ec98d60cc69a34d6a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-04-17T15:25:08Z",
    "title_canon_sha256": "875f6136886badb8f8c7c6f6f0a85f2e2b3898a6bb5ea2afa38c98dbfb1e0da7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.2725",
    "kind": "arxiv",
    "version": 1
  }
}