Pith Number

pith:4QFCF3TA

pith:2009:4QFCF3TAGH3Y5GPGHXOBQYNOMD

not attested not anchored not stored refs pending

Controllability and observabiliy of an artificial advection-diffusion problem

Pierre Cornilleau, Sergio Guerrero

arxiv:0902.4881 v5 · 2009-02-27 · math.OC · cs.SY · math.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4QFCF3TAGH3Y5GPGHXOBQYNOMD}

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	2026-05-18T01:17:53.690938Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e40a22ee6031f78e99e63ddc1861ae60f4cc4c5b6bbc7547d5a0f24ef25efdd9

Aliases

arxiv: 0902.4881 · arxiv_version: 0902.4881v5 · doi: 10.48550/arxiv.0902.4881 · pith_short_12: 4QFCF3TAGH3Y · pith_short_16: 4QFCF3TAGH3Y5GPG · pith_short_8: 4QFCF3TA

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/4QFCF3TAGH3Y5GPGHXOBQYNOMD \
  | 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: e40a22ee6031f78e99e63ddc1861ae60f4cc4c5b6bbc7547d5a0f24ef25efdd9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dab222a82c16683707a4d934fc2858b976c709e9490fae5a6262b6d34c6bf018",
    "cross_cats_sorted": [
      "cs.SY",
      "math.AP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2009-02-27T17:57:23Z",
    "title_canon_sha256": "d5593887fea618e8395cac20d8a53c8e432407d05251cf142219e457d221094d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.4881",
    "kind": "arxiv",
    "version": 5
  }
}