Pith Number

pith:633JLUCH

pith:2008:633JLUCHBLXQ5ETU463NLVP2TP

not attested not anchored not stored refs pending

The origin of 'Great Walls'

Sergei Shandarin

arxiv:0812.4771 v2 · 2008-12-27 · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{633JLUCHBLXQ5ETU463NLVP2TP}

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	2026-05-18T02:35:08.496722Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f6f695d0470aef0e9274e7b6d5d5fa9bce2b5de38f80415e4f9194445fb55625

Aliases

arxiv: 0812.4771 · arxiv_version: 0812.4771v2 · doi: 10.48550/arxiv.0812.4771 · pith_short_12: 633JLUCHBLXQ · pith_short_16: 633JLUCHBLXQ5ETU · pith_short_8: 633JLUCH

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/633JLUCHBLXQ5ETU463NLVP2TP \
  | 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: f6f695d0470aef0e9274e7b6d5d5fa9bce2b5de38f80415e4f9194445fb55625

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "42f8aab8794e230209a1105f0ff3a3b457b9368fe2bf834674bc2a00590d7d45",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-12-27T21:20:08Z",
    "title_canon_sha256": "a5b8d773ec2639ad1b76e2ee7a802ed71a5b8a985167b10774201ced18dde0e7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0812.4771",
    "kind": "arxiv",
    "version": 2
  }
}