Pith Number

pith:3JJ2L3ID

pith:2009:3JJ2L3IDSWRBYKH6ZV35LR6PSH

not attested not anchored not stored refs pending

Constraint algorithm for k-presymplectic Hamiltonian systems. Application to singular field theories

Narciso Roman-Roy, Ruben Martin, Xavier Gracia

arxiv:0903.1791 v1 · 2009-03-10 · 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{3JJ2L3IDSWRBYKH6ZV35LR6PSH}

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	2026-05-18T01:24:31.173558Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

da53a5ed0395a21c28fecd77d5c7cf91fa9d5e1701a0c24d4d859abf97680612

Aliases

arxiv: 0903.1791 · arxiv_version: 0903.1791v1 · doi: 10.48550/arxiv.0903.1791 · pith_short_12: 3JJ2L3IDSWRB · pith_short_16: 3JJ2L3IDSWRBYKH6 · pith_short_8: 3JJ2L3ID

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/3JJ2L3IDSWRBYKH6ZV35LR6PSH \
  | 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: da53a5ed0395a21c28fecd77d5c7cf91fa9d5e1701a0c24d4d859abf97680612

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2e13bc18e159223fe3ffa9cb9ea9d2e47026eea070620a83fe6dee6c81a58480",
    "cross_cats_sorted": [
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math-ph",
    "submitted_at": "2009-03-10T15:10:06Z",
    "title_canon_sha256": "9ccb61d7b985b06572d9ad629b3ff066d76f5fd5c857d976086e1d69961b3e49"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.1791",
    "kind": "arxiv",
    "version": 1
  }
}