Pith Number

pith:W6CQ5LPS

pith:2019:W6CQ5LPSSAOZE65ZRFGXVCS2I2

not attested not anchored not stored refs pending

Nonlinear Control of Quadcopters via Approximate Dynamic Programming

Angel Romero, John Lygeros, Paul N. Beuchat, Roy S. Smith, Yvonne R. St\"urz

arxiv:1902.06551 v1 · 2019-02-18 · 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{W6CQ5LPSSAOZE65ZRFGXVCS2I2}

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	2026-05-17T23:53:45.147256Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b7850eadf2901d927bb9894d7a8a5a46bdc67cf0aa134570826f6570f8675e05

Aliases

arxiv: 1902.06551 · arxiv_version: 1902.06551v1 · doi: 10.48550/arxiv.1902.06551 · pith_short_12: W6CQ5LPSSAOZ · pith_short_16: W6CQ5LPSSAOZE65Z · pith_short_8: W6CQ5LPS

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/W6CQ5LPSSAOZE65ZRFGXVCS2I2 \
  | 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: b7850eadf2901d927bb9894d7a8a5a46bdc67cf0aa134570826f6570f8675e05

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2e45ab7a37bd25f24e9effdc2adf65f7ee73308a70846d09fd9e90f70cc7d603",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SY",
    "submitted_at": "2019-02-18T12:58:26Z",
    "title_canon_sha256": "9e811b928fc13aa21c466c0b3012476ea6f57b7da7ee93198a9a1af2a3bafbdf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.06551",
    "kind": "arxiv",
    "version": 1
  }
}