Pith Number

pith:O245F4JO

pith:2008:O245F4JO7RYZXJBMOCEQCBGS2E

not attested not anchored not stored refs pending

Variational and Geometric Structures of Discrete Dirac Mechanics

Melvin Leok, Tomoki Ohsawa

arxiv:0810.0740 v2 · 2008-10-04 · math.SG · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{O245F4JO7RYZXJBMOCEQCBGS2E}

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	2026-05-18T02:27:19.318061Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

76b9d2f12efc719ba42c70890104d2d1329ea32045b4d3f269047afbf0035bfd

Aliases

arxiv: 0810.0740 · arxiv_version: 0810.0740v2 · doi: 10.48550/arxiv.0810.0740 · pith_short_12: O245F4JO7RYZ · pith_short_16: O245F4JO7RYZXJBM · pith_short_8: O245F4JO

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/O245F4JO7RYZXJBMOCEQCBGS2E \
  | 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: 76b9d2f12efc719ba42c70890104d2d1329ea32045b4d3f269047afbf0035bfd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2101feafdb5539f06dcf53d2ae358645e56cf16da63195183c549ef205c116fe",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.SG",
    "submitted_at": "2008-10-04T00:44:29Z",
    "title_canon_sha256": "5dc23a7f643751563c6bdd6e6d92355449d32075c74efb4679fe694b2108899d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0810.0740",
    "kind": "arxiv",
    "version": 2
  }
}