Pith Number

pith:YSLPVQPO

pith:2011:YSLPVQPOKTBFS7CPZ5OINNJJ65

not attested not anchored not stored refs pending

Perturbed damped pendulum: finding periodic solutions

Douglas Duarte Novaes

arxiv:1112.2129 v2 · 2011-12-09 · 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{YSLPVQPOKTBFS7CPZ5OINNJJ65}

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	2026-05-18T02:51:42.671029Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c496fac1ee54c2597c4fcf5c86b529f7600f75f257db2a99a945c87e1108d55b

Aliases

arxiv: 1112.2129 · arxiv_version: 1112.2129v2 · doi: 10.48550/arxiv.1112.2129 · pith_short_12: YSLPVQPOKTBF · pith_short_16: YSLPVQPOKTBFS7CP · pith_short_8: YSLPVQPO

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/YSLPVQPOKTBFS7CPZ5OINNJJ65 \
  | 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: c496fac1ee54c2597c4fcf5c86b529f7600f75f257db2a99a945c87e1108d55b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "230ae321b524d7ed133ef73f32feb60c0ec0d2a80d8ca10a96b53782af20a248",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DS",
    "submitted_at": "2011-12-09T15:56:48Z",
    "title_canon_sha256": "7f08de70b1d53e5171f57de13420f51ac21d2f86c7042ad85ebf9bec1b5ea47e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.2129",
    "kind": "arxiv",
    "version": 2
  }
}