Pith Number

pith:KIWDAW7Y

pith:2017:KIWDAW7YFJXD4FRE6YH7ZJNBWF

not attested not anchored not stored refs pending

Supervisory observer for parameter and state estimation of nonlinear systems using the DIRECT algorithm

Dragan Nesic, Michelle S. Chong, Romain Postoyan, Sei Zhen Khong

arxiv:1709.01272 v1 · 2017-09-05 · 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{KIWDAW7YFJXD4FRE6YH7ZJNBWF}

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	2026-05-18T00:36:00.526026Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

522c305bf82a6e3e1624f60ffca5a1b143fe94b6477dd684f8758bc00363032c

Aliases

arxiv: 1709.01272 · arxiv_version: 1709.01272v1 · doi: 10.48550/arxiv.1709.01272 · pith_short_12: KIWDAW7YFJXD · pith_short_16: KIWDAW7YFJXD4FRE · pith_short_8: KIWDAW7Y

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/KIWDAW7YFJXD4FRE6YH7ZJNBWF \
  | 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: 522c305bf82a6e3e1624f60ffca5a1b143fe94b6477dd684f8758bc00363032c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "385d509391ef55f23157dd21ff9f2b4f023823adcd1af6a26be52e4842c0c5a7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2017-09-05T07:59:37Z",
    "title_canon_sha256": "153e2090fc478321d81bbad2b5b3a6be30b2183b39e31cb0f0917723375df504"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1709.01272",
    "kind": "arxiv",
    "version": 1
  }
}