Pith Number

pith:EVYF4EQJ

pith:2012:EVYF4EQJCNU7CXYI4CRRPJAPZW

not attested not anchored not stored refs pending

11-12 Gyr old White Dwarfs 30 parsecs Away

J. Andrews, John R. Thorstensen, Mukremin Kilic, P. M. Kowalski

arxiv:1204.2570 v1 · 2012-04-11 · astro-ph.GA · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EVYF4EQJCNU7CXYI4CRRPJAPZW}

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	2026-05-18T01:57:53.348784Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

25705e12091369f15f08e0a317a40fcda59f0af31a43bc722d977e9b717de2d5

Aliases

arxiv: 1204.2570 · arxiv_version: 1204.2570v1 · doi: 10.48550/arxiv.1204.2570 · pith_short_12: EVYF4EQJCNU7 · pith_short_16: EVYF4EQJCNU7CXYI · pith_short_8: EVYF4EQJ

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/EVYF4EQJCNU7CXYI4CRRPJAPZW \
  | 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: 25705e12091369f15f08e0a317a40fcda59f0af31a43bc722d977e9b717de2d5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2e884d4cb91d7e54c0f8af4e33f5c28a741798098ff50c0102c33ed5020a3e30",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2012-04-11T21:00:08Z",
    "title_canon_sha256": "ce3138823e3ea1d10da65f01aaf1659d5134b7c2a083cd61470375145f972b2f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.2570",
    "kind": "arxiv",
    "version": 1
  }
}