Pith Number

pith:NP2NOTPX

pith:2013:NP2NOTPX2ZHXFTLMGYWRKNEQRM

not attested not anchored not stored refs pending

A characterization of normal forms for control systems

Boumediene Hamzi, Debra Lewis, Jeroen S.W. Lamb

arxiv:1303.7245 v1 · 2013-03-28 · math.OC · 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{NP2NOTPX2ZHXFTLMGYWRKNEQRM}

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	2026-05-18T03:29:29.039061Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6bf4d74df7d64f72cd6c362d1534908b028ebfdd09012849e464edfbd96805a2

Aliases

arxiv: 1303.7245 · arxiv_version: 1303.7245v1 · doi: 10.48550/arxiv.1303.7245 · pith_short_12: NP2NOTPX2ZHX · pith_short_16: NP2NOTPX2ZHXFTLM · pith_short_8: NP2NOTPX

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/NP2NOTPX2ZHXFTLMGYWRKNEQRM \
  | 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: 6bf4d74df7d64f72cd6c362d1534908b028ebfdd09012849e464edfbd96805a2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0eddc2658ce5c3bfd26356deb3e357d8f72051f72dbf2b46493807ae64e8d859",
    "cross_cats_sorted": [
      "math.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2013-03-28T20:23:22Z",
    "title_canon_sha256": "e441ef1bcc8184106890db95ae583a3bd561e87a260b53b52a81760775b46a9e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.7245",
    "kind": "arxiv",
    "version": 1
  }
}