Pith Number

pith:FOYY7HED

pith:2009:FOYY7HEDBVBJEGWHQQDQ7CXCGL

not attested not anchored not stored refs pending

Hamiltonian flows on null curves

Emilio Musso, Lorenzo Nicolodi

arxiv:0911.4467 v2 · 2009-11-23 · math.DG · math-ph · math.MP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FOYY7HEDBVBJEGWHQQDQ7CXCGL}

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	2026-05-18T02:34:03.965888Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2bb18f9c830d42921ac784070f8ae232e087dafb99bd80feb1ca0a8d718103d9

Aliases

arxiv: 0911.4467 · arxiv_version: 0911.4467v2 · doi: 10.48550/arxiv.0911.4467 · pith_short_12: FOYY7HEDBVBJ · pith_short_16: FOYY7HEDBVBJEGWH · pith_short_8: FOYY7HED

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/FOYY7HEDBVBJEGWHQQDQ7CXCGL \
  | 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: 2bb18f9c830d42921ac784070f8ae232e087dafb99bd80feb1ca0a8d718103d9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8408d1d62a0eba57ee66b6aead3300bceab062e96d5b94e5e529c3b4a4e3e139",
    "cross_cats_sorted": [
      "math-ph",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2009-11-23T18:40:58Z",
    "title_canon_sha256": "5b03274064d220fb45ad68b03da2c5959a5e832f5ad53dd3c88bd5826cfbc946"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.4467",
    "kind": "arxiv",
    "version": 2
  }
}