Pith Number

pith:IUVOFDRB

pith:2007:IUVOFDRBMQNLA7RHBWWPTKQZ6G

not attested not anchored not stored refs pending

On The Extended Knotted Disks of Galaxies

Daniel Christlein, Dennis Zaritsky

arxiv:astro-ph/0703487 v1 · 2007-03-19 · 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{IUVOFDRBMQNLA7RHBWWPTKQZ6G}

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	2026-07-04T15:25:04.123724Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

452ae28e21641ab07e270dacf9aa19f19c2dab2ed3825b5b02ff79b8df6f58df

Aliases

arxiv: astro-ph/0703487 · arxiv_version: astro-ph/0703487v1 · doi: 10.48550/arxiv.astro-ph/0703487 · pith_short_12: IUVOFDRBMQNL · pith_short_16: IUVOFDRBMQNLA7RH · pith_short_8: IUVOFDRB

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/IUVOFDRBMQNLA7RHBWWPTKQZ6G \
  | 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: 452ae28e21641ab07e270dacf9aa19f19c2dab2ed3825b5b02ff79b8df6f58df

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ef7b0ae9caaf97a689d22248bda9726eefc1aa96a0591a7bb6c2b850c9b7d23e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-03-19T14:50:32Z",
    "title_canon_sha256": "37057889ad5538e957499adcce4c3f2e7c0a51b6975f82ae91cb38d76f074fb2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0703487",
    "kind": "arxiv",
    "version": 1
  }
}