Pith Number

pith:ZTX5SQJG

pith:2015:ZTX5SQJG23445YU2CZH5LMZOEE

not attested not anchored not stored refs pending

Positive Unknown Input Observer For Positive Linear Systems

Amirreza Oghbaee, Bahram Shafai, Sam Nazari

arxiv:1507.03243 v2 · 2015-07-12 · 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{ZTX5SQJG23445YU2CZH5LMZOEE}

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	2026-05-18T01:35:54.081442Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ccefd94126d6f9cee29a164fd5b32e212a98107de0581b41bfae6382c244448a

Aliases

arxiv: 1507.03243 · arxiv_version: 1507.03243v2 · doi: 10.48550/arxiv.1507.03243 · pith_short_12: ZTX5SQJG2344 · pith_short_16: ZTX5SQJG23445YU2 · pith_short_8: ZTX5SQJG

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/ZTX5SQJG23445YU2CZH5LMZOEE \
  | 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: ccefd94126d6f9cee29a164fd5b32e212a98107de0581b41bfae6382c244448a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eac25f21c130d90cee1ee6b2e011c7c7087650de67081767b729a38186ac0b5c",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.SY",
    "submitted_at": "2015-07-12T16:03:50Z",
    "title_canon_sha256": "2256c51a092b13a2d0e1b1367c01cc80124fc1ad80effcad9be8914d4616df71"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.03243",
    "kind": "arxiv",
    "version": 2
  }
}