Pith Number

pith:IK7W5FFC

pith:2011:IK7W5FFCKROYFDCVSQUNV2TZGH

not attested not anchored not stored refs pending

On the formation of trapezium-like systems

Richard Allison, Simon Goodwin

arxiv:1104.1933 v1 · 2011-04-11 · 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{IK7W5FFCKROYFDCVSQUNV2TZGH}

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	2026-05-18T02:02:35.574123Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

42bf6e94a2545d828c559428daea7931d00cb9bd53166cf50daac923f18dc3cd

Aliases

arxiv: 1104.1933 · arxiv_version: 1104.1933v1 · doi: 10.48550/arxiv.1104.1933 · pith_short_12: IK7W5FFCKROY · pith_short_16: IK7W5FFCKROYFDCV · pith_short_8: IK7W5FFC

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/IK7W5FFCKROYFDCVSQUNV2TZGH \
  | 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: 42bf6e94a2545d828c559428daea7931d00cb9bd53166cf50daac923f18dc3cd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "68ee9c77db94b93c74084fb0d1d66ca5b164bb9acdd3f81c47ac83f579b55af3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2011-04-11T13:03:18Z",
    "title_canon_sha256": "1f580ca42721edfd2cb61f0edfd3d47c006e002c49cfee0ae626bed04186f376"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.1933",
    "kind": "arxiv",
    "version": 1
  }
}