Pith Number

pith:QO43XAG7

pith:2019:QO43XAG7IOCD3AYP66AF5YD7KS

not attested not anchored not stored refs pending

Empirical Differential Gramians for Nonlinear Model Reduction

Jacquelien M.A. Scherpen, Yu Kawano

arxiv:1902.09836 v2 · 2019-02-26 · eess.SY · cs.SY · 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{QO43XAG7IOCD3AYP66AF5YD7KS}

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	2026-06-04T20:13:56.426347Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

83b9bb80df43843d830ff7805ee07f549a69d6df79c5ca14fa7c123f8ebed6ff

Aliases

arxiv: 1902.09836 · arxiv_version: 1902.09836v2 · doi: 10.48550/arxiv.1902.09836 · pith_short_12: QO43XAG7IOCD · pith_short_16: QO43XAG7IOCD3AYP · pith_short_8: QO43XAG7

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/QO43XAG7IOCD3AYP66AF5YD7KS \
  | 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: 83b9bb80df43843d830ff7805ee07f549a69d6df79c5ca14fa7c123f8ebed6ff

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8844aad47defd70f2853f2d328c545ec9d87a40b935445642966808b018e4e9d",
    "cross_cats_sorted": [
      "cs.SY",
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.SY",
    "submitted_at": "2019-02-26T10:06:14Z",
    "title_canon_sha256": "1b2e1d400274c957c6f00a41579ff16d42e240cf3ef23ea9fecac27990be80af"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.09836",
    "kind": "arxiv",
    "version": 2
  }
}