Pith Number

pith:U4XXLH6N

pith:2015:U4XXLH6N5XLQK2Q3RUSZDSQZF2

not attested not anchored not stored refs pending

A Fundamental Plane of Spiral Structure in Disk Galaxies

Benjamin L. Davis, Daniel Kennefick, Douglas W. Shields, Joel C. Berrier, Julia Kennefick, Kyle B. Westfall, Matthew T. Hartley, Rob A. Swaters, Russell Flatman, Thomas P. K. Martinsson

arxiv:1503.03070 v3 · 2015-03-10 · 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{U4XXLH6N5XLQK2Q3RUSZDSQZF2}

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	2026-05-18T00:52:44.507507Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a72f759fcdedd7056a1b8d2591ca192eb605c26b72b4601df031b58c8c5aa32c

Aliases

arxiv: 1503.03070 · arxiv_version: 1503.03070v3 · doi: 10.48550/arxiv.1503.03070 · pith_short_12: U4XXLH6N5XLQ · pith_short_16: U4XXLH6N5XLQK2Q3 · pith_short_8: U4XXLH6N

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/U4XXLH6N5XLQK2Q3RUSZDSQZF2 \
  | 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: a72f759fcdedd7056a1b8d2591ca192eb605c26b72b4601df031b58c8c5aa32c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5c30042703ad76b3882159311d9d85a02d478593c595047e4ce6f5566360c7b2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2015-03-10T20:00:18Z",
    "title_canon_sha256": "9bb14cfe9b4653759758d78afa4d5dc07506d8dc3683046d7da908f2bb7e7551"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.03070",
    "kind": "arxiv",
    "version": 3
  }
}