Pith Number

pith:FO4Z4TMJ

pith:2022:FO4Z4TMJMY5CPC6WCKVI3TJFUP

not attested not anchored not stored refs pending

Adaptive state observer for linear time-varying system with partially unknown parameters of the state matrix and the input vector

Alexey Bobtsov, Nikolay Nikolaev, Olga Kozachek, Olga Slita, Romeo Ortega

arxiv:2203.15391 v1 · 2022-03-29 · 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{FO4Z4TMJMY5CPC6WCKVI3TJFUP}

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	2026-07-05T04:09:24.876842Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2bb99e4d89663a278bd612aa8dcd25a3d8bbe6e085ae77ed3f25decd68479496

Aliases

arxiv: 2203.15391 · arxiv_version: 2203.15391v1 · doi: 10.48550/arxiv.2203.15391 · pith_short_12: FO4Z4TMJMY5C · pith_short_16: FO4Z4TMJMY5CPC6W · pith_short_8: FO4Z4TMJ

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/FO4Z4TMJMY5CPC6WCKVI3TJFUP \
  | 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: 2bb99e4d89663a278bd612aa8dcd25a3d8bbe6e085ae77ed3f25decd68479496

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "198094a542546aa105e808e01f8db4265321701626127c3fc0e2b8fbc517432c",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "math.DS",
    "submitted_at": "2022-03-29T09:32:04Z",
    "title_canon_sha256": "42bb4e86aa3734f7c148c958b4bbdf9054f5d9ba8e2f49e6c7b94d5aba802c23"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2203.15391",
    "kind": "arxiv",
    "version": 1
  }
}