Pith Number

pith:E32ERIPL

pith:2018:E32ERIPLBRVOZ6E732ERHZ7NYT

not attested not anchored not stored refs pending

Contracts as specifications for dynamical systems in driving variable form

Arjan van der Schaft, Bart Besselink, Karl H. Johansson

arxiv:1810.05542 v2 · 2018-10-12 · cs.SY · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{E32ERIPLBRVOZ6E732ERHZ7NYT}

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	2026-05-17T23:51:14.169025Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

26f448a1eb0c6aecf89fde8913e7edc4f78eabfcc343fc2aa09487f3dd4ec145

Aliases

arxiv: 1810.05542 · arxiv_version: 1810.05542v2 · doi: 10.48550/arxiv.1810.05542 · pith_short_12: E32ERIPLBRVO · pith_short_16: E32ERIPLBRVOZ6E7 · pith_short_8: E32ERIPL

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/E32ERIPLBRVOZ6E732ERHZ7NYT \
  | 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: 26f448a1eb0c6aecf89fde8913e7edc4f78eabfcc343fc2aa09487f3dd4ec145

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "602a12a0774702b4716364463efebbaecf71b67f79142c5acb1c541ba1e73110",
    "cross_cats_sorted": [
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SY",
    "submitted_at": "2018-10-12T14:14:19Z",
    "title_canon_sha256": "c83f305666829323f448102fe2b3465f4411d54c9af61ce57f88249170964554"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.05542",
    "kind": "arxiv",
    "version": 2
  }
}