Pith Number

pith:QPTLPGQ5

pith:2016:QPTLPGQ5TSCN3T3VVZWRJR5ZAI

not attested not anchored not stored refs pending

Riccati equations and optimal control of well-posed linear systems

Kalle M. Mikkola

arxiv:1602.08618 v1 · 2016-02-27 · 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{QPTLPGQ5TSCN3T3VVZWRJR5ZAI}

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.

Cited by

1 paper in Pith

LQ optimal control for infinite-dimensional passive systems

Receipt and verification

First computed	2026-05-18T01:19:52.379722Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

83e6b79a1d9c84ddcf75ae6d14c7b9020bf34dbf0aaf46585a921abdf8fd6226

Aliases

arxiv: 1602.08618 · arxiv_version: 1602.08618v1 · doi: 10.48550/arxiv.1602.08618 · pith_short_12: QPTLPGQ5TSCN · pith_short_16: QPTLPGQ5TSCN3T3V · pith_short_8: QPTLPGQ5

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/QPTLPGQ5TSCN3T3VVZWRJR5ZAI \
  | 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: 83e6b79a1d9c84ddcf75ae6d14c7b9020bf34dbf0aaf46585a921abdf8fd6226

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ef016db78ec118a234fae203c120e476375472e4f318199f81435511f4129325",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2016-02-27T17:28:44Z",
    "title_canon_sha256": "46a9cbf8fd83931088f725b86f21405db740d8b829b70661a8d3d8d1bfe2880b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.08618",
    "kind": "arxiv",
    "version": 1
  }
}