Pith Number

pith:MEFZMQ2I

pith:2011:MEFZMQ2INDVXM3HJW5RFUOL5XC

not attested not anchored not stored refs pending

Isochronic Pendulum

Sumit Kumar

arxiv:1107.5664 v1 · 2011-07-28 · 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{MEFZMQ2INDVXM3HJW5RFUOL5XC}

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	2026-05-18T04:16:41.594120Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

610b96434868eb766ce9b7625a397db8abbc79c07158399ef6645d67dd3e543e

Aliases

arxiv: 1107.5664 · arxiv_version: 1107.5664v1 · doi: 10.48550/arxiv.1107.5664 · pith_short_12: MEFZMQ2INDVX · pith_short_16: MEFZMQ2INDVXM3HJ · pith_short_8: MEFZMQ2I

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/MEFZMQ2INDVXM3HJW5RFUOL5XC \
  | 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: 610b96434868eb766ce9b7625a397db8abbc79c07158399ef6645d67dd3e543e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "676b83fa2e70031d7d0c154910ab93b80829c224a0d27500f1bc9f2331970c0b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.class-ph",
    "submitted_at": "2011-07-28T09:52:46Z",
    "title_canon_sha256": "449f6c3af7c733d081fc12e7397e8c6939da899529969e0a4cc3cc9dfaa70e28"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.5664",
    "kind": "arxiv",
    "version": 1
  }
}