Pith Number

pith:IU77NH6T

pith:2013:IU77NH6TJRVLO64LRZJH4WSBFU

not attested not anchored not stored refs pending

Integrability of the double pendulum -- the Ramis' question

Vladimir Salnikov

arxiv:1303.4904 v2 · 2013-03-20 · 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{IU77NH6TJRVLO64LRZJH4WSBFU}

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	2026-05-18T01:18:00.566870Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

453ff69fd34c6ab77b8b8e527e5a412d0f02d3937c39da8fc5f02bb4a78bd019

Aliases

arxiv: 1303.4904 · arxiv_version: 1303.4904v2 · doi: 10.48550/arxiv.1303.4904 · pith_short_12: IU77NH6TJRVL · pith_short_16: IU77NH6TJRVLO64L · pith_short_8: IU77NH6T

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/IU77NH6TJRVLO64LRZJH4WSBFU \
  | 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: 453ff69fd34c6ab77b8b8e527e5a412d0f02d3937c39da8fc5f02bb4a78bd019

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f88860435d1ff6ece4861d497d5b2a4908d2de300becdfc5c4d483eec0d03437",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DS",
    "submitted_at": "2013-03-20T11:13:13Z",
    "title_canon_sha256": "59d6fb112fd67544a0e468367568258eababceab7b62a06bf0b5ddac675da9dd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.4904",
    "kind": "arxiv",
    "version": 2
  }
}