Pith Number

pith:K5PN2P7L

pith:2013:K5PN2P7LLK4TCDSN2J7O5L52B6

not attested not anchored not stored refs pending

A scaling-relation for disc galaxies: circular-velocity gradient versus central surface brightness

2), (2) Department of Physics, Astronomy, Federico Lelli (1), Filippo Fraternali (1, Marc Verheijen (1) ((1) Kapteyn Astronomical Institute, University of Bologna), University of Groningen

arxiv:1304.4250 v1 · 2013-04-15 · 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{K5PN2P7LLK4TCDSN2J7O5L52B6}

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	2026-05-18T01:50:32.499533Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

575edd3feb5ab9310e4dd27eeeafba0f83fb7319383ae4e0d59cdbbb4e27d63d

Aliases

arxiv: 1304.4250 · arxiv_version: 1304.4250v1 · doi: 10.48550/arxiv.1304.4250 · pith_short_12: K5PN2P7LLK4T · pith_short_16: K5PN2P7LLK4TCDSN · pith_short_8: K5PN2P7L

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/K5PN2P7LLK4TCDSN2J7O5L52B6 \
  | 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: 575edd3feb5ab9310e4dd27eeeafba0f83fb7319383ae4e0d59cdbbb4e27d63d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "38feaf71621e0244fc449d11e1d41c0cea50dff1d39346ee05073ce44db88ad0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-04-15T20:04:54Z",
    "title_canon_sha256": "4a2ec3b327110e4d2659673b9f4ba5bf69c6c77302c76f49b88564b9ecb16e26"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.4250",
    "kind": "arxiv",
    "version": 1
  }
}