Pith Number

pith:SFZC4UZO

pith:2017:SFZC4UZOPBTHZ5LKRJYYC5MKWO

not attested not anchored not stored refs pending

On State Observers for Nonlinear Systems: A New Design and a Unifying Framework

Bowen Yi, Romeo Ortega, Weidong Zhang

arxiv:1712.08209 v2 · 2017-12-21 · cs.SY

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SFZC4UZOPBTHZ5LKRJYYC5MKWO}

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	2026-05-18T00:11:00.083602Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

91722e532e78667cf56a8a7181758ab3a6b4470a50cea463a96e2c30be2b3aab

Aliases

arxiv: 1712.08209 · arxiv_version: 1712.08209v2 · doi: 10.48550/arxiv.1712.08209 · pith_short_12: SFZC4UZOPBTH · pith_short_16: SFZC4UZOPBTHZ5LK · pith_short_8: SFZC4UZO

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/SFZC4UZOPBTHZ5LKRJYYC5MKWO \
  | 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: 91722e532e78667cf56a8a7181758ab3a6b4470a50cea463a96e2c30be2b3aab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b2210a7b5f66818bdb587be3b97bde50e18d360b4d379bb023000057eb157407",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SY",
    "submitted_at": "2017-12-21T20:50:48Z",
    "title_canon_sha256": "62eb9cdd4404af01a2381b84139b4bfae727b096cbb5cedfa3247dad73e06d91"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1712.08209",
    "kind": "arxiv",
    "version": 2
  }
}