Pith Number

pith:JQA77EBW

pith:2019:JQA77EBW3GJCRETIE2CGP6Y7FI

not attested not anchored not stored refs pending

Sampled-Data Observers for Delay Systems and Hyperbolic PDE-ODE Loops

Fouad Giri, Iasson Karafyllis, Tarek Ahmed-Ali

arxiv:1907.06691 v1 · 2019-07-15 · math.OC · cs.SY · eess.SY

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JQA77EBW3GJCRETIE2CGP6Y7FI}

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	2026-05-17T23:40:29.407746Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4c01ff9036d992289268268467fb1f2a3e2a1f319eccc98ff3b4a4ef6b6a9c2d

Aliases

arxiv: 1907.06691 · arxiv_version: 1907.06691v1 · doi: 10.48550/arxiv.1907.06691 · pith_short_12: JQA77EBW3GJC · pith_short_16: JQA77EBW3GJCRETI · pith_short_8: JQA77EBW

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/JQA77EBW3GJCRETIE2CGP6Y7FI \
  | 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: 4c01ff9036d992289268268467fb1f2a3e2a1f319eccc98ff3b4a4ef6b6a9c2d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e22054d2ffa04014c5ab990f855bc8932ead2d02961f324f40e47ec7dc4e5b61",
    "cross_cats_sorted": [
      "cs.SY",
      "eess.SY"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2019-07-15T18:46:34Z",
    "title_canon_sha256": "5a45af5d9735c0dd4b45228c4c889115247b5b10d9265d00a59b059265794be0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.06691",
    "kind": "arxiv",
    "version": 1
  }
}