Pith Number

pith:NL4S6W2V

pith:2000:NL4S6W2VWEO5FITAWKAN6673U3

not attested not anchored not stored refs pending

The Rolling Motion of a Disk on a Horizontal Plane

Alexander J. McDonald, Kirk T. McDonald

arxiv:physics/0008227 v3 · 2000-08-28 · physics.class-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{NL4S6W2VWEO5FITAWKAN6673U3}

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	2026-07-04T14:43:20.732543Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6af92f5b55b11dd2a260b280df7bfba6cc758154d124a466d1fd6448a1b4973a

Aliases

arxiv: physics/0008227 · arxiv_version: physics/0008227v3 · doi: 10.48550/arxiv.physics/0008227 · pith_short_12: NL4S6W2VWEO5 · pith_short_16: NL4S6W2VWEO5FITA · pith_short_8: NL4S6W2V

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/NL4S6W2VWEO5FITAWKAN6673U3 \
  | 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: 6af92f5b55b11dd2a260b280df7bfba6cc758154d124a466d1fd6448a1b4973a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "65b69e3eb8699bc0bfb2e4fad01d8986b065ccbcd22ac7f95f5c0175f8873a3d",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "physics.class-ph",
    "submitted_at": "2000-08-28T05:30:04Z",
    "title_canon_sha256": "8ce8727629f5eee3c5f5ec782253d8c173c384217c147ec3c53e0cb7bacbc304"
  },
  "schema_version": "1.0",
  "source": {
    "id": "physics/0008227",
    "kind": "arxiv",
    "version": 3
  }
}