Pith Number

pith:LQZYZLDV

pith:2019:LQZYZLDVJ7LOADFDPWL5VY4JIL

not attested not anchored not stored refs pending

Sparse Graph Codes for Non-adaptive Quantitative Group Testing

Alex Sprintson, Anoosheh Heidarzadeh, Esmaeil Karimi, Fatemeh Kazemi, Krishna R. Narayanan

arxiv:1901.07635 v3 · 2019-01-22 · cs.IT · 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{LQZYZLDVJ7LOADFDPWL5VY4JIL}

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	2026-05-17T23:47:50.700015Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5c338cac754fd6e00ca37d97dae38942d6e3235f1671f413eb5729ff9d6f7c3d

Aliases

arxiv: 1901.07635 · arxiv_version: 1901.07635v3 · doi: 10.48550/arxiv.1901.07635 · pith_short_12: LQZYZLDVJ7LO · pith_short_16: LQZYZLDVJ7LOADFD · pith_short_8: LQZYZLDV

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/LQZYZLDVJ7LOADFDPWL5VY4JIL \
  | 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: 5c338cac754fd6e00ca37d97dae38942d6e3235f1671f413eb5729ff9d6f7c3d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5b4327243f8c0c6558844142097092a20d1941828999036b6d70dd58f2b0884c",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2019-01-22T22:43:48Z",
    "title_canon_sha256": "b74c51a719dae0221b7441e7c03c1876b5d9f7795ad55c10f2fd4d3cdfbed27c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.07635",
    "kind": "arxiv",
    "version": 3
  }
}