Pith Number

pith:KJC5GCCV

pith:2014:KJC5GCCVZVC7QWTFPCELFLVM7O

not attested not anchored not stored refs pending

Continuous-Time Singular Linear-Quadratic Control: Necessary and Sufficient Conditions for the Existence of Regular Solutions

Augusto Ferrante, Lorenzo Ntogramatzidis

arxiv:1404.1667 v1 · 2014-04-07 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KJC5GCCVZVC7QWTFPCELFLVM7O}

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	2026-05-18T02:54:45.813223Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5245d30855cd45f85a657888b2aeacfba0a641f2d117355c7e8828fa6470e928

Aliases

arxiv: 1404.1667 · arxiv_version: 1404.1667v1 · doi: 10.48550/arxiv.1404.1667 · pith_short_12: KJC5GCCVZVC7 · pith_short_16: KJC5GCCVZVC7QWTF · pith_short_8: KJC5GCCV

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/KJC5GCCVZVC7QWTFPCELFLVM7O \
  | 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: 5245d30855cd45f85a657888b2aeacfba0a641f2d117355c7e8828fa6470e928

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0901be1c9603997da95a28f8a2b5cbca18aeca1fbfc4cbd5d473fe39567307f0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2014-04-07T06:26:28Z",
    "title_canon_sha256": "ad8661f022fdea32ca08df712dc105f3f19b4b1bcc48469e81f274d1f328f5f3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.1667",
    "kind": "arxiv",
    "version": 1
  }
}