Pith Number

pith:VN4EVOT4

pith:2012:VN4EVOT4GHS4FYVFP2LOO5AS7B

not attested not anchored not stored refs pending

Towards the Evolution of Vertical-Axis Wind Turbines using Supershapes

Larry Bull, Richard J. Preen

arxiv:1204.4107 v4 · 2012-04-18 · cs.NE · cs.CG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VN4EVOT4GHS4FYVFP2LOO5AS7B}

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	2026-05-18T01:20:50.902980Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ab784aba7c31e5c2e2a57e96e77412f84a34412ba891745a4f97f3c18908aa9c

Aliases

arxiv: 1204.4107 · arxiv_version: 1204.4107v4 · doi: 10.48550/arxiv.1204.4107 · pith_short_12: VN4EVOT4GHS4 · pith_short_16: VN4EVOT4GHS4FYVF · pith_short_8: VN4EVOT4

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/VN4EVOT4GHS4FYVFP2LOO5AS7B \
  | 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: ab784aba7c31e5c2e2a57e96e77412f84a34412ba891745a4f97f3c18908aa9c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d0935b1347ace23eb56c7aad609e390f433ee1649f9806eb6fa8d1e6080732c2",
    "cross_cats_sorted": [
      "cs.CG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NE",
    "submitted_at": "2012-04-18T15:22:26Z",
    "title_canon_sha256": "17a2426f4b7afa83cd34eb05dbe824c55c63a3b55aa78e30a54d4911616a7491"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.4107",
    "kind": "arxiv",
    "version": 4
  }
}