Pith Number

pith:S3EPN3CE

pith:2019:S3EPN3CE6BCWE2K77T5UKEHRGF

not attested not anchored not stored refs pending

Optimal group testing

Amin Coja-Oghlan, Max Hahn-Klimroth, Oliver Gebhard, Philipp Loick

arxiv:1911.02287 v3 · 2019-11-06 · cs.DM · cs.IT · math.CO · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{S3EPN3CE6BCWE2K77T5UKEHRGF}

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	2026-07-05T02:39:55.604535Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

96c8f6ec44f04562695ffcfb4510f131542b40e91416d6fdc4d806da3a9d25cf

Aliases

arxiv: 1911.02287 · arxiv_version: 1911.02287v3 · doi: 10.48550/arxiv.1911.02287 · pith_short_12: S3EPN3CE6BCW · pith_short_16: S3EPN3CE6BCWE2K7 · pith_short_8: S3EPN3CE

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/S3EPN3CE6BCWE2K77T5UKEHRGF \
  | 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: 96c8f6ec44f04562695ffcfb4510f131542b40e91416d6fdc4d806da3a9d25cf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "429b1cdb3b4bc8b873b25937d1629c1e8e5fcdfcdbb99dabc4b6a47d8422af26",
    "cross_cats_sorted": [
      "cs.IT",
      "math.CO",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2019-11-06T10:20:46Z",
    "title_canon_sha256": "80b906ea51b632eaa60142d9ef506bf3a120dbb8ba45bef5ac5cfe3cd46d8898"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1911.02287",
    "kind": "arxiv",
    "version": 3
  }
}