Pith Number

pith:ZXBTPFNK

pith:2013:ZXBTPFNK36UOQU3S24SXXOIDG5

not attested not anchored not stored refs pending

Polar ring galaxies as tests of gravity

B. Famaey, F. Combes, F. L\"ughausen, G. Angus, G. Gentile, H. Zhao, O. Tiret, P. Kroupa

arxiv:1304.4931 v1 · 2013-04-17 · astro-ph.GA · astro-ph.CO · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZXBTPFNK36UOQU3S24SXXOIDG5}

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	2026-05-18T03:25:34.478152Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cdc33795aadfa8e85372d7257bb903376559cdfd12dd3307dca74a26f2263765

Aliases

arxiv: 1304.4931 · arxiv_version: 1304.4931v1 · doi: 10.48550/arxiv.1304.4931 · pith_short_12: ZXBTPFNK36UO · pith_short_16: ZXBTPFNK36UOQU3S · pith_short_8: ZXBTPFNK

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/ZXBTPFNK36UOQU3S24SXXOIDG5 \
  | 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: cdc33795aadfa8e85372d7257bb903376559cdfd12dd3307dca74a26f2263765

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3eba49a74a0d5360b997110876710838632643953206f0cb06e72da20fca9ad1",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2013-04-17T20:00:00Z",
    "title_canon_sha256": "beff314a7bbb4a570b876dcdb33612bc114f65636202cbf71911daa1615313ef"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.4931",
    "kind": "arxiv",
    "version": 1
  }
}