Pith Number

pith:4J73CVHL

pith:2012:4J73CVHLVQYDHL4VWMPEKPTXUX

not attested not anchored not stored refs pending

The infant Milky Way

Andrea Ferrara (2) ((1) Kapteyn Astronomical Institute, Groningen, Italy), Pisa, Stefania Salvadori (1), The Netherlands (2) Scuola Normale Superiore

arxiv:1204.1943 v1 · 2012-04-09 · 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{4J73CVHLVQYDHL4VWMPEKPTXUX}

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	2026-05-18T03:58:14.660688Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e27fb154ebac3033af95b31e453e77a5e02af96c1e00d74b3b353ae46ba81ba3

Aliases

arxiv: 1204.1943 · arxiv_version: 1204.1943v1 · doi: 10.48550/arxiv.1204.1943 · pith_short_12: 4J73CVHLVQYD · pith_short_16: 4J73CVHLVQYDHL4V · pith_short_8: 4J73CVHL

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/4J73CVHLVQYDHL4VWMPEKPTXUX \
  | 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: e27fb154ebac3033af95b31e453e77a5e02af96c1e00d74b3b353ae46ba81ba3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e193532b849ae915025f9c6374a4d37b712a456f09e9c0778e2e0fd3f65d724a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-04-09T18:30:02Z",
    "title_canon_sha256": "8b62e60983a0019265afe79887c4370e32a2994b663e0e03b7e3264190acc23e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.1943",
    "kind": "arxiv",
    "version": 1
  }
}