Pith Number

pith:NPGN2EJ7

pith:2012:NPGN2EJ7RHHGU2J32IRJC2N4IA

not attested not anchored not stored refs pending

Higher-order Mechanics: Variational Principles and other topics

Narciso Rom\'an-Roy, Pedro D. Prieto-Mart\'inez

arxiv:1201.4102 v2 · 2012-01-19 · 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{NPGN2EJ7RHHGU2J32IRJC2N4IA}

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	2026-05-18T03:02:18.024777Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6bccdd113f89ce6a693bd2229169bc4019d14367e010f36cda8f6af6c32ef089

Aliases

arxiv: 1201.4102 · arxiv_version: 1201.4102v2 · doi: 10.48550/arxiv.1201.4102 · pith_short_12: NPGN2EJ7RHHG · pith_short_16: NPGN2EJ7RHHGU2J3 · pith_short_8: NPGN2EJ7

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/NPGN2EJ7RHHGU2J32IRJC2N4IA \
  | 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: 6bccdd113f89ce6a693bd2229169bc4019d14367e010f36cda8f6af6c32ef089

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "49efe2e80f18b4243d126302de568f0f773188814571b563595a6a1a3981516f",
    "cross_cats_sorted": [
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math-ph",
    "submitted_at": "2012-01-19T16:41:59Z",
    "title_canon_sha256": "305660e644add1d64c9481039bea0a8a9e142ea10f7670de0720f7a23664016f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.4102",
    "kind": "arxiv",
    "version": 2
  }
}