Pith Number

pith:XRDMWSM3

pith:2009:XRDMWSM3UQ5QAWTPV2RESACM5Z

not attested not anchored not stored refs pending

Adaptive Observers and Parameter Estimation for a Class of Systems Nonlinear in the Parameters

Cees van Leeuwen, Erik Steur, Henk Nijmeijer, Ivan Y. Tyukin

arxiv:0903.2361 v7 · 2009-03-13 · math.OC · cs.SY · math.DS · q-bio.QM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XRDMWSM3UQ5QAWTPV2RESACM5Z}

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	2026-05-18T02:24:56.286785Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bc46cb499ba43b005a6faea249004cee4ac3d602e5708b8cc637a3649ba28e4e

Aliases

arxiv: 0903.2361 · arxiv_version: 0903.2361v7 · doi: 10.48550/arxiv.0903.2361 · pith_short_12: XRDMWSM3UQ5Q · pith_short_16: XRDMWSM3UQ5QAWTP · pith_short_8: XRDMWSM3

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/XRDMWSM3UQ5QAWTPV2RESACM5Z \
  | 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: bc46cb499ba43b005a6faea249004cee4ac3d602e5708b8cc637a3649ba28e4e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1d35ed5c3999d81bf3a663fa779beda11fbe705d6ef59e0fbc9c3dcad8680f4b",
    "cross_cats_sorted": [
      "cs.SY",
      "math.DS",
      "q-bio.QM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2009-03-13T12:01:17Z",
    "title_canon_sha256": "d7719f0e1459883a61981e24996d3216467f80824af49ed9329f41019e9ca26a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0903.2361",
    "kind": "arxiv",
    "version": 7
  }
}