Pith Number

pith:7LSVO2CJ

pith:2019:7LSVO2CJ2K5NQ7SW52CLWRMFAY

not attested not anchored not stored refs pending

A pseudo-spectra based characterisation of the robust strong H-infinity norm of time-delay systems with real-valued and structured uncertainties

Pieter Appeltans, Wim Michiels

arxiv:1909.07778 v1 · 2019-09-17 · math.NA · cs.NA · 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{7LSVO2CJ2K5NQ7SW52CLWRMFAY}

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	2026-07-05T00:05:17.750239Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fae5576849d2bad87e56ee84bb4585060f8660dd1ca43ec1a465de4c078b8b8f

Aliases

arxiv: 1909.07778 · arxiv_version: 1909.07778v1 · doi: 10.48550/arxiv.1909.07778 · pith_short_12: 7LSVO2CJ2K5N · pith_short_16: 7LSVO2CJ2K5NQ7SW · pith_short_8: 7LSVO2CJ

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/7LSVO2CJ2K5NQ7SW52CLWRMFAY \
  | 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: fae5576849d2bad87e56ee84bb4585060f8660dd1ca43ec1a465de4c078b8b8f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4f1edf5a457b84030f11f9120d59ff85d64a027fb375809a28f476f78fd0afa4",
    "cross_cats_sorted": [
      "cs.NA",
      "cs.SY",
      "eess.SY"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-09-17T13:32:34Z",
    "title_canon_sha256": "0a886c887390cc112991a29ce0353698127a535f7bd456348e9d7335518e2c2c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.07778",
    "kind": "arxiv",
    "version": 1
  }
}