Pith Number

pith:QIK3WHRV

pith:2017:QIK3WHRVM6SHAMH35V327IPOR5

not attested not anchored not stored refs pending

Hypergeometric First Integrals of the Duffing and van der Pol Oscillators

Tomasz Stachowiak

arxiv:1706.02506 v3 · 2017-06-08 · math-ph · math.MP · nlin.SI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QIK3WHRVM6SHAMH35V327IPOR5}

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	2026-05-17T23:51:54.872602Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8215bb1e3567a47030fbed77afa1ee8f44ca307522dad6d707a81bff3c648530

Aliases

arxiv: 1706.02506 · arxiv_version: 1706.02506v3 · doi: 10.48550/arxiv.1706.02506 · pith_short_12: QIK3WHRVM6SH · pith_short_16: QIK3WHRVM6SHAMH3 · pith_short_8: QIK3WHRV

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/QIK3WHRVM6SHAMH35V327IPOR5 \
  | 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: 8215bb1e3567a47030fbed77afa1ee8f44ca307522dad6d707a81bff3c648530

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "38b2b761714af33e794e1b365e4bf1aacaadcd3307580f70ed331bb5b8130d58",
    "cross_cats_sorted": [
      "math.MP",
      "nlin.SI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math-ph",
    "submitted_at": "2017-06-08T10:30:18Z",
    "title_canon_sha256": "02c0c9f453a29268b1599918f7edfcad4b63fe22ec62dda025cb29f234e09555"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1706.02506",
    "kind": "arxiv",
    "version": 3
  }
}