Pith Number

pith:QUBQYHZ5

pith:2009:QUBQYHZ552NLH3BQKBTFYDRWOC

not attested not anchored not stored refs pending

Darboux points and integrability of homogeneous Hamiltonian systems with three and more degrees of freedom. Nongeneric cases

Maria Przybylska

arxiv:0903.5069 v1 · 2009-03-29 · 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{QUBQYHZ552NLH3BQKBTFYDRWOC}

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	2026-05-18T02:14:18.716399Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85030c1f3dee9ab3ec3050665c0e36708b9e08529f2a76e4b5fbee5173721eba

Aliases

arxiv: 0903.5069 · arxiv_version: 0903.5069v1 · doi: 10.48550/arxiv.0903.5069 · pith_short_12: QUBQYHZ552NL · pith_short_16: QUBQYHZ552NLH3BQ · pith_short_8: QUBQYHZ5

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/QUBQYHZ552NLH3BQKBTFYDRWOC \
  | 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: 85030c1f3dee9ab3ec3050665c0e36708b9e08529f2a76e4b5fbee5173721eba

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2178b65eef420ce77a38bf2d9093019107db10f8dfbb5916334f2212242d1643",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "nlin.SI",
    "submitted_at": "2009-03-29T17:13:14Z",
    "title_canon_sha256": "49cb57a6bd44439f066f68c2c91bd303fb37ba956273b10ba6a8ea387e4ed14f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.5069",
    "kind": "arxiv",
    "version": 1
  }
}