Pith Number

pith:5QWRLW2X

pith:2015:5QWRLW2XD5KZOB3HSQG5VZMTET

not attested not anchored not stored refs pending

A quaternion-based model for optimal control of the SkySails airborne wind energy system

Greg Horn, Michael Erhard, Moritz Diehl

arxiv:1508.05494 v1 · 2015-08-22 · math.OC · cs.SY

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5QWRLW2XD5KZOB3HSQG5VZMTET}

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	2026-05-18T01:05:12.746390Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ec2d15db571f55970767940ddae59324e6eefb57f11ffa6a3eb09f8b25679179

Aliases

arxiv: 1508.05494 · arxiv_version: 1508.05494v1 · doi: 10.48550/arxiv.1508.05494 · pith_short_12: 5QWRLW2XD5KZ · pith_short_16: 5QWRLW2XD5KZOB3H · pith_short_8: 5QWRLW2X

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/5QWRLW2XD5KZOB3HSQG5VZMTET \
  | 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: ec2d15db571f55970767940ddae59324e6eefb57f11ffa6a3eb09f8b25679179

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "32cc61396e351e9ba214a3f7e9fca0174c5a7d8cedd1ffa113e9fe8ae50d94ee",
    "cross_cats_sorted": [
      "cs.SY"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2015-08-22T10:56:05Z",
    "title_canon_sha256": "69c12d04df6600c8fc4c328eee3a3e734453754f25a8edf8dac846d8d7f39d6b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.05494",
    "kind": "arxiv",
    "version": 1
  }
}