Pith Number

pith:BPBE7CYD

pith:2012:BPBE7CYDZNCZBBKRL552LJTY2K

not attested not anchored not stored refs pending

Hamel's Formalism and Variational Integrators on a Sphere

Anthony M. Bloch, Dmitry V. Zenkov, Melvin Leok

arxiv:1211.4607 v1 · 2012-11-19 · 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{BPBE7CYDZNCZBBKRL552LJTY2K}

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	2026-05-18T03:40:26.205563Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0bc24f8b03cb459085515f7ba5a678d2ab88c798e71d374ddc2e6bc03ce6d7b3

Aliases

arxiv: 1211.4607 · arxiv_version: 1211.4607v1 · doi: 10.48550/arxiv.1211.4607 · pith_short_12: BPBE7CYDZNCZ · pith_short_16: BPBE7CYDZNCZBBKR · pith_short_8: BPBE7CYD

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/BPBE7CYDZNCZBBKRL552LJTY2K \
  | 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: 0bc24f8b03cb459085515f7ba5a678d2ab88c798e71d374ddc2e6bc03ce6d7b3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5974da0e4b437b784d20de7578725a74ed2962e47ea250c877c0376efc5bbed6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2012-11-19T22:06:29Z",
    "title_canon_sha256": "088b8b11b888d32b8fd8579e3e7c86805a9c6e64dec210d1d50be97f2c4dcf33"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.4607",
    "kind": "arxiv",
    "version": 1
  }
}