Pith Number

pith:AZK5IVVW

pith:2009:AZK5IVVWYYXQU4MXQYWZ4IU6TD

not attested not anchored not stored refs pending

Galaxy Zoo: Reproducing Galaxy Morphologies Via Machine Learning

Alex Szalay, Anze Slosar, Cambridge/UCL), Chris J. Lintott (Oxford), Dan Andreescu, Daniel Thomas, Filipe B. Abdalla (UCL), Jan vandenBerg, Kevin Schawinski, Manda Banerji (IoA, M. Jordan Raddick, Ofer Lahav (UCL), Phil Murray, Steven P. Bamford

arxiv:0908.2033 v2 · 2009-08-14 · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{AZK5IVVWYYXQU4MXQYWZ4IU6TD}

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	2026-05-18T02:12:34.323195Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0655d456b6c62f0a7197862d9e229e98e9eac204c6f3313df2b338e10b7098d2

Aliases

arxiv: 0908.2033 · arxiv_version: 0908.2033v2 · doi: 10.48550/arxiv.0908.2033 · pith_short_12: AZK5IVVWYYXQ · pith_short_16: AZK5IVVWYYXQU4MX · pith_short_8: AZK5IVVW

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/AZK5IVVWYYXQU4MXQYWZ4IU6TD \
  | 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: 0655d456b6c62f0a7197862d9e229e98e9eac204c6f3313df2b338e10b7098d2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "754d3edef98044b57257a6b357f8658492e31515932d5aef734570d02a9c012b",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-08-14T10:19:14Z",
    "title_canon_sha256": "ab121e1a7e4938bfb86ab95e90b5ec1fd9f6d4f91a4b1f881f3536be17588d45"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.2033",
    "kind": "arxiv",
    "version": 2
  }
}