Pith Number

pith:UDZ4IHDA

pith:1997:UDZ4IHDALWZEFJ3H7WMBSKXNID

not attested not anchored not stored refs pending

Variable Extended Objects in SA 57

Dario Trevese (Istituto Astronomico, Matthew A. Bershady (U. of Wisconsin; Penn State), Richard G. Kron (U. Chicago/FNAL), U. degli Studi-Roma "La Sapienza")

arxiv:astro-ph/9711053 v1 · 1997-11-06 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UDZ4IHDALWZEFJ3H7WMBSKXNID}

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	2026-07-04T16:03:21.689944Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a0f3c41c605db242a767fd98192aed40f52f4e87981a27717e9f3f11e3cb5c3d

Aliases

arxiv: astro-ph/9711053 · arxiv_version: astro-ph/9711053v1 · doi: 10.48550/arxiv.astro-ph/9711053 · pith_short_12: UDZ4IHDALWZE · pith_short_16: UDZ4IHDALWZEFJ3H · pith_short_8: UDZ4IHDA

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/UDZ4IHDALWZEFJ3H7WMBSKXNID \
  | 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: a0f3c41c605db242a767fd98192aed40f52f4e87981a27717e9f3f11e3cb5c3d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "073c286f4e7be5792b7070b53da3b4483831f39393904d361d5bd4c413cf8b5b",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-11-06T16:19:08Z",
    "title_canon_sha256": "9bc91009add4cb11871be6f7d77718871bd134054bc37e66dc13ef3d997ec138"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9711053",
    "kind": "arxiv",
    "version": 1
  }
}