Pith Number

pith:DNK2JXC4

pith:2011:DNK2JXC4HMUPA2QC5K37KZXKGJ

not attested not anchored not stored refs pending

The Curious Case of Lemaitre's Equation No. 24

Sidney van den Bergh

arxiv:1106.1195 v1 · 2011-06-06 · physics.hist-ph · 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{DNK2JXC4HMUPA2QC5K37KZXKGJ}

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	2026-05-18T04:20:24.337546Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1b55a4dc5c3b28f06a02eab7f566ea32775cd5598e34fbb646fdba85973ff443

Aliases

arxiv: 1106.1195 · arxiv_version: 1106.1195v1 · doi: 10.48550/arxiv.1106.1195 · pith_short_12: DNK2JXC4HMUP · pith_short_16: DNK2JXC4HMUPA2QC · pith_short_8: DNK2JXC4

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/DNK2JXC4HMUPA2QC5K37KZXKGJ \
  | 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: 1b55a4dc5c3b28f06a02eab7f566ea32775cd5598e34fbb646fdba85973ff443

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "834bccb7e7185ffc614132ce170cb38035d7d21bfabf489c7755c45eec7aa834",
    "cross_cats_sorted": [
      "astro-ph.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.hist-ph",
    "submitted_at": "2011-06-06T20:47:56Z",
    "title_canon_sha256": "ae194de527b092c6e3a7c187845d3d191b49010b37354fd4d6c8a43e50ad08fb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1106.1195",
    "kind": "arxiv",
    "version": 1
  }
}