Pith Number

pith:GUENP4VR

pith:2010:GUENP4VRMQZP7W7XMXT3ZO3XFW

not attested not anchored not stored refs pending

Tadpole Galaxies in the Hubble Ultra Deep Field

(2) Vassar College Observatory), Bruce G. Elmegreen (1), Debra Meloy Elmegreen (2) ((1) IBM Watson Research Center

arxiv:1009.1530 v1 · 2010-09-08 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GUENP4VRMQZP7W7XMXT3ZO3XFW}

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	2026-05-18T02:05:35.133905Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3508d7f2b16432ffdbf765e7bcbb772db491fd7b85912754c733d989cddfa984

Aliases

arxiv: 1009.1530 · arxiv_version: 1009.1530v1 · doi: 10.48550/arxiv.1009.1530 · pith_short_12: GUENP4VRMQZP · pith_short_16: GUENP4VRMQZP7W7X · pith_short_8: GUENP4VR

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/GUENP4VRMQZP7W7XMXT3ZO3XFW \
  | 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: 3508d7f2b16432ffdbf765e7bcbb772db491fd7b85912754c733d989cddfa984

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "722e55e2d46b3dae145ab0e4a5dd176f84a5f1476e8837a2390e02c34ec5bff5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2010-09-08T13:27:31Z",
    "title_canon_sha256": "779f4a73113ad10605f9807b569633f001e3489efe1549cb08b327498d3f313e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1009.1530",
    "kind": "arxiv",
    "version": 1
  }
}