Pith Number

pith:5N62JHIP

pith:2012:5N62JHIPDLRKVGZGRD2ODNADB2

not attested not anchored not stored refs pending

A numerical algorithm for singular optimal LQ control systems

A. Ibort, M. Delgado-Tellez

arxiv:1203.2194 v1 · 2012-03-09 · math.OC · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5N62JHIPDLRKVGZGRD2ODNADB2}

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	2026-05-18T04:00:26.150889Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eb7da49d0f1ae2aa9b2688f4e1b4030e870892bf487040c5c4e30154912ee26e

Aliases

arxiv: 1203.2194 · arxiv_version: 1203.2194v1 · doi: 10.48550/arxiv.1203.2194 · pith_short_12: 5N62JHIPDLRK · pith_short_16: 5N62JHIPDLRKVGZG · pith_short_8: 5N62JHIP

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/5N62JHIPDLRKVGZGRD2ODNADB2 \
  | 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: eb7da49d0f1ae2aa9b2688f4e1b4030e870892bf487040c5c4e30154912ee26e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d6c21e2c51a6ec0b589e3dfa37eb3e1b9c8f84c19eff4401c5dda829022cecf5",
    "cross_cats_sorted": [
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2012-03-09T22:03:39Z",
    "title_canon_sha256": "383a210f4a8f6c9c88c9ac8634b7bec0e6b293d8bfada2974fcebb1eff48318d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1203.2194",
    "kind": "arxiv",
    "version": 1
  }
}