Pith Number

pith:NUMMMTXY

pith:2011:NUMMMTXYATMCW2IOVJZ3LKAKP6

not attested not anchored not stored refs pending

Galaxy Zoo: Morphological Classification and Citizen Science

Chris Lintott, Edd Edmondson, John Wallin, Jordan Raddick, Karen Masters, Kevin Schawinski, Kirk Borne, Lucy Fortson, Robert Nichol

arxiv:1104.5513 v1 · 2011-04-28 · astro-ph.IM · 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{NUMMMTXYATMCW2IOVJZ3LKAKP6}

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	2026-05-18T04:23:20.878792Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6d18c64ef804d82b690eaa73b5a80a7fbeb92dac453038a629ac5764a236fea8

Aliases

arxiv: 1104.5513 · arxiv_version: 1104.5513v1 · doi: 10.48550/arxiv.1104.5513 · pith_short_12: NUMMMTXYATMC · pith_short_16: NUMMMTXYATMCW2IO · pith_short_8: NUMMMTXY

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/NUMMMTXYATMCW2IOVJZ3LKAKP6 \
  | 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: 6d18c64ef804d82b690eaa73b5a80a7fbeb92dac453038a629ac5764a236fea8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "609d90da305e079ee73b57994f3c0c1418d6bce7061ca4c3c7db9f1bfa018dde",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2011-04-28T21:17:00Z",
    "title_canon_sha256": "dda4479db9e680daf14e2bd41028ebaba9b13a03677cbf38b6e101e8ff1d1174"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.5513",
    "kind": "arxiv",
    "version": 1
  }
}