Pith Number

pith:N2XLR2IJ

pith:2009:N2XLR2IJIWA22LPJ4PKXNZAMMP

not attested not anchored not stored refs pending

Origin and evolution of galactic spin from looking at galaxy pairs

(2) Instituto de Astronomia-Universidad Nacional Autonoma de Mexico, (3) Korea Institute for Advanced Study), Bernardo Cervantes-Sodi (1), Changbom Park (3) ((1) Korea Astronomy, Space Science Institute, X. Hernandez (2)

arxiv:0912.1151 v1 · 2009-12-07 · 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{N2XLR2IJIWA22LPJ4PKXNZAMMP}

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	2026-05-18T02:33:57.391115Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6eaeb8e9094581ad2de9e3d576e40c63d2afc4da33d7ccc8e7a3508388694ab7

Aliases

arxiv: 0912.1151 · arxiv_version: 0912.1151v1 · doi: 10.48550/arxiv.0912.1151 · pith_short_12: N2XLR2IJIWA2 · pith_short_16: N2XLR2IJIWA22LPJ · pith_short_8: N2XLR2IJ

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/N2XLR2IJIWA22LPJ4PKXNZAMMP \
  | 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: 6eaeb8e9094581ad2de9e3d576e40c63d2afc4da33d7ccc8e7a3508388694ab7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "69b378c325afa178559b787e427c5f67ae4ff0bd81276dc8439058b694ac7fb8",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-12-07T01:06:55Z",
    "title_canon_sha256": "8d99bf7def42c0acad28964d223de822dd8efa400303cc89c398044058b1f2ff"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.1151",
    "kind": "arxiv",
    "version": 1
  }
}