Pith Number

pith:QRE7RQ3R

pith:2018:QRE7RQ3REXVJOE2FHSXP4LRFZQ

not attested not anchored not stored refs pending

Radio Galaxy Zoo: Machine learning for radio source host galaxy cross-identification

C. S. Ong, C. Wolf, H. Andernach, J. K. Banfield, L. Rudnick, M. J. Alger, O. I. Wong, R. P. Norris, S. S. Shabala

arxiv:1805.05540 v1 · 2018-05-15 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QRE7RQ3REXVJOE2FHSXP4LRFZQ}

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	2026-05-18T00:15:46.268589Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8449f8c37125ea9713453caefe2e25cc1163cedb1267332aa4c47a04929d42b5

Aliases

arxiv: 1805.05540 · arxiv_version: 1805.05540v1 · doi: 10.48550/arxiv.1805.05540 · pith_short_12: QRE7RQ3REXVJ · pith_short_16: QRE7RQ3REXVJOE2F · pith_short_8: QRE7RQ3R

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/QRE7RQ3REXVJOE2FHSXP4LRFZQ \
  | 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: 8449f8c37125ea9713453caefe2e25cc1163cedb1267332aa4c47a04929d42b5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9a9e68c7ee3ed7841e232563d3e3d5d55c45cc3f0212d64ea3308635d57e8fc3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2018-05-15T03:01:00Z",
    "title_canon_sha256": "996b94ef75380212242b18698d8aaed707fb7febf6f34e17b0f2c1cd8093bcf7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.05540",
    "kind": "arxiv",
    "version": 1
  }
}