Pith Number

pith:27BRSMNO

pith:2011:27BRSMNO4YPHP2VWA5IIBGYTUU

not attested not anchored not stored refs pending

Construction of Almost Disjunct Matrices for Group Testing

Arya Mazumdar

arxiv:1111.5003 v2 · 2011-11-21 · cs.IT · cs.DM · 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{27BRSMNO4YPHP2VWA5IIBGYTUU}

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	2026-05-18T03:15:06.762179Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d7c31931aee61e77eab60750809b13a52463713c6ea779849398d3f945fc457a

Aliases

arxiv: 1111.5003 · arxiv_version: 1111.5003v2 · doi: 10.48550/arxiv.1111.5003 · pith_short_12: 27BRSMNO4YPH · pith_short_16: 27BRSMNO4YPHP2VW · pith_short_8: 27BRSMNO

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/27BRSMNO4YPHP2VWA5IIBGYTUU \
  | 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: d7c31931aee61e77eab60750809b13a52463713c6ea779849398d3f945fc457a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a247098160e37b090fb7a29c3d43eb43d48d5931c7a0e643732db09da4c2de4e",
    "cross_cats_sorted": [
      "cs.DM",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2011-11-21T20:55:02Z",
    "title_canon_sha256": "5c5ff38c050a5bf344527f3a19706038360dc6d8378f0cd486f534e70d3f5460"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1111.5003",
    "kind": "arxiv",
    "version": 2
  }
}