Pith Number

pith:3LHK7I7S

pith:2015:3LHK7I7SR3MQCGDPFC7RDCR2QY

not attested not anchored not stored refs pending

State and parameter estimation: a nonlinear Luenberger observer approach

Chouaib Afri (LAGEP), Laurent Bako, Pascal Dufour (LAGEP), Vincent Andrieu (LAGEP)

arxiv:1511.07687 v2 · 2015-11-24 · math.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3LHK7I7SR3MQCGDPFC7RDCR2QY}

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	2026-05-18T01:15:14.696675Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

daceafa3f28ed901186f28bf118a3a862f03084f444ebdf0440fa4a577468391

Aliases

arxiv: 1511.07687 · arxiv_version: 1511.07687v2 · doi: 10.48550/arxiv.1511.07687 · pith_short_12: 3LHK7I7SR3MQ · pith_short_16: 3LHK7I7SR3MQCGDP · pith_short_8: 3LHK7I7S

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/3LHK7I7SR3MQCGDPFC7RDCR2QY \
  | 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: daceafa3f28ed901186f28bf118a3a862f03084f444ebdf0440fa4a577468391

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6d5118868200c6112febd4ba138d2668e589093d1c0c84f3caa0295a0c352c8b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DS",
    "submitted_at": "2015-11-24T12:56:34Z",
    "title_canon_sha256": "43b80ce647d975c38141030db456a1c56184eaca73253f8a85701264d8c862e5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1511.07687",
    "kind": "arxiv",
    "version": 2
  }
}