Pith Number

pith:D7HQQE3U

pith:2003:D7HQQE3UL2C72VU4QAB33UXZYN

not attested not anchored not stored refs pending

An Approximate Expression for the Large Angle Period of a Simple Pendulum

Rajesh R. Parwani

arxiv:physics/0303036 v1 · 2003-03-10 · physics.ed-ph · 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{D7HQQE3UL2C72VU4QAB33UXZYN}

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	2026-05-18T01:05:14.503350Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1fcf0813745e85fd569c8003bdd2f9c3414952dd18a69cd9358dccf5ad9ea8dd

Aliases

arxiv: physics/0303036 · arxiv_version: physics/0303036v1 · doi: 10.48550/arxiv.physics/0303036 · pith_short_12: D7HQQE3UL2C7 · pith_short_16: D7HQQE3UL2C72VU4 · pith_short_8: D7HQQE3U

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/D7HQQE3UL2C72VU4QAB33UXZYN \
  | 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: 1fcf0813745e85fd569c8003bdd2f9c3414952dd18a69cd9358dccf5ad9ea8dd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5005a480abdd4fa445920f5fb9faf543defe5d544a87e0b3c92061db0d381539",
    "cross_cats_sorted": [
      "physics.gen-ph"
    ],
    "license": "",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2003-03-10T09:47:21Z",
    "title_canon_sha256": "659cb8017b8c09b300dac1931e3d6493a60883f95517e39ddd4a07edbbc40371"
  },
  "schema_version": "1.0",
  "source": {
    "id": "physics/0303036",
    "kind": "arxiv",
    "version": 1
  }
}