Pith Number

pith:5WZZLSGY

pith:2009:5WZZLSGY2Q5GMPLUGFGZXHPWM2

not attested not anchored not stored refs pending

On the origin of Fanaroff-Riley classification of radio galaxies: Deceleration of supersonic radio lobes

Hiroshi Nagai, Motoki Kino, Nozomu Kawakatu

arxiv:0904.4752 v1 · 2009-04-30 · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5WZZLSGY2Q5GMPLUGFGZXHPWM2}

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	2026-05-18T04:29:43.251367Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

edb395c8d8d43a663d74314d9b9df666ad1a22db54e6357ad20da417e70482c6

Aliases

arxiv: 0904.4752 · arxiv_version: 0904.4752v1 · doi: 10.48550/arxiv.0904.4752 · pith_short_12: 5WZZLSGY2Q5G · pith_short_16: 5WZZLSGY2Q5GMPLU · pith_short_8: 5WZZLSGY

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/5WZZLSGY2Q5GMPLUGFGZXHPWM2 \
  | 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: edb395c8d8d43a663d74314d9b9df666ad1a22db54e6357ad20da417e70482c6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "18bf503428200a0f1b87e08d58e7f2088e46d8d4dbc083eb6d7a512fef35cecf",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-04-30T06:48:51Z",
    "title_canon_sha256": "6bf389ebd4156de0cc84d90ff1eb64a8f5d705074bbb15c1242ee67b46097cc5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.4752",
    "kind": "arxiv",
    "version": 1
  }
}