Pith Number

pith:GKO4KAWR

pith:2011:GKO4KAWREUYNGHQQOLXSJBWCM2

not attested not anchored not stored refs pending

On the periodic solutions of a perturbed double pendulum

Douglas Duarte Novaes, Jaume Llibre, Marco Antonio Teixeira

arxiv:1109.6378 v2 · 2011-09-29 · math.DS

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GKO4KAWREUYNGHQQOLXSJBWCM2}

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	2026-05-18T02:21:36.161055Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

329dc502d12530d31e1072ef2486c2669d71313b1d9e05ca7e25d65ca77de43e

Aliases

arxiv: 1109.6378 · arxiv_version: 1109.6378v2 · doi: 10.48550/arxiv.1109.6378 · pith_short_12: GKO4KAWREUYN · pith_short_16: GKO4KAWREUYNGHQQ · pith_short_8: GKO4KAWR

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/GKO4KAWREUYNGHQQOLXSJBWCM2 \
  | 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: 329dc502d12530d31e1072ef2486c2669d71313b1d9e05ca7e25d65ca77de43e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d02e762780aae7d95b4925f01fd5b526098c54800b6854f8a3508ea1733105e2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DS",
    "submitted_at": "2011-09-29T01:17:31Z",
    "title_canon_sha256": "2ecdc1681fdf4ed5eade1de3e2a4938a36064051299e806678f4ad2a7def5d26"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.6378",
    "kind": "arxiv",
    "version": 2
  }
}