Pith Number

pith:6VRSTSDY

pith:2009:6VRSTSDY5466NNXSFYA56H4MJV

not attested not anchored not stored refs pending

Lindblad's epicycles - valid method or bad science?

Charles Francis

arxiv:0911.1594 v1 · 2009-11-09 · physics.gen-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{6VRSTSDY5466NNXSFYA56H4MJV}

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	2026-07-04T16:40:40.065818Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f56329c878ef3de6b6f22e01df1f8c4d7d58e7402e23b8e720084d40007a9517

Aliases

arxiv: 0911.1594 · arxiv_version: 0911.1594v1 · doi: 10.48550/arxiv.0911.1594 · pith_short_12: 6VRSTSDY5466 · pith_short_16: 6VRSTSDY5466NNXS · pith_short_8: 6VRSTSDY

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/6VRSTSDY5466NNXSFYA56H4MJV \
  | 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: f56329c878ef3de6b6f22e01df1f8c4d7d58e7402e23b8e720084d40007a9517

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9259cc4a36aad66ed3233141cb141a3f616dc547e39450db62a542f235503ce9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.gen-ph",
    "submitted_at": "2009-11-09T06:35:54Z",
    "title_canon_sha256": "47ae9240a7cf781165455b42dc1e4a28eab79dcc38aa953ea130a02e3e119bde"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.1594",
    "kind": "arxiv",
    "version": 1
  }
}