Pith Number

pith:CGZXSKJA

pith:2000:CGZXSKJAB2GBEOCAIPVNVEVSZO

not attested not anchored not stored refs pending

Circular Orbits Inside the Sphere of Death

Kirk T. McDonald

arxiv:physics/0008226 v1 · 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{CGZXSKJAB2GBEOCAIPVNVEVSZO}

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	2026-07-04T16:22:13.967064Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

11b37929200e8c12384043eada92b2cba8f9d9789e2a45e78e2af8aa8f14b684

Aliases

arxiv: physics/0008226 · arxiv_version: physics/0008226v1 · doi: 10.48550/arxiv.physics/0008226 · pith_short_12: CGZXSKJAB2GB · pith_short_16: CGZXSKJAB2GBEOCA · pith_short_8: CGZXSKJA

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/CGZXSKJAB2GBEOCAIPVNVEVSZO \
  | 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: 11b37929200e8c12384043eada92b2cba8f9d9789e2a45e78e2af8aa8f14b684

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "846e9d268e15f5a989ae6fb01b59e28d9ce10930751815a2feebc0efd7c7dd97",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "physics.class-ph",
    "submitted_at": "2000-08-28T05:07:46Z",
    "title_canon_sha256": "16398b448b2fb74178d5316674fadb241fa9cceb9b3029ad8f74900d7e555e52"
  },
  "schema_version": "1.0",
  "source": {
    "id": "physics/0008226",
    "kind": "arxiv",
    "version": 1
  }
}