Pith Number

pith:34ZCT7TL

pith:2017:34ZCT7TL7DH3JZGJU3HB557VO4

not attested not anchored not stored refs pending

The geometry of the generalized algebraic Riccati equation and of the singular Hamiltonian system

Augusto Ferrante, Lorenzo Ntogramatzidis

arxiv:1706.05828 v1 · 2017-06-19 · 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{34ZCT7TL7DH3JZGJU3HB557VO4}

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	2026-05-18T00:42:08.762426Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

df3229fe6bf8cfb4e4c9a6ce1ef7f5773a4eb04c54f27d27fdcc370108d00441

Aliases

arxiv: 1706.05828 · arxiv_version: 1706.05828v1 · doi: 10.48550/arxiv.1706.05828 · pith_short_12: 34ZCT7TL7DH3 · pith_short_16: 34ZCT7TL7DH3JZGJ · pith_short_8: 34ZCT7TL

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/34ZCT7TL7DH3JZGJU3HB557VO4 \
  | 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: df3229fe6bf8cfb4e4c9a6ce1ef7f5773a4eb04c54f27d27fdcc370108d00441

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dac5c60cc247efc95a18488b33f93629c816e20e79a4023553f9382bcf628df7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2017-06-19T08:40:15Z",
    "title_canon_sha256": "6e6d2b238430b81cd06da3a9e9eb01806db001a0cf845267e7f58dd84ce46131"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1706.05828",
    "kind": "arxiv",
    "version": 1
  }
}