Pith Number

pith:QUCG7QD7

pith:2015:QUCG7QD7IDBLEQMC6F6GUM5VRW

not attested not anchored not stored refs pending

New bounds on the number of tests for disjunct matrices

Chong Shangguan, Gennian Ge

arxiv:1501.03566 v2 · 2015-01-15 · 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{QUCG7QD7IDBLEQMC6F6GUM5VRW}

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	2026-05-18T01:01:29.366598Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85046fc07f40c2b24182f17c6a33b58dbae48815d492542156913dc9129b3b08

Aliases

arxiv: 1501.03566 · arxiv_version: 1501.03566v2 · doi: 10.48550/arxiv.1501.03566 · pith_short_12: QUCG7QD7IDBL · pith_short_16: QUCG7QD7IDBLEQMC · pith_short_8: QUCG7QD7

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/QUCG7QD7IDBLEQMC6F6GUM5VRW \
  | 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: 85046fc07f40c2b24182f17c6a33b58dbae48815d492542156913dc9129b3b08

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "701394570d15608cecab1e4c0621063646de2d3a2e57fc71f80bf988c7377bc5",
    "cross_cats_sorted": [
      "math.CO",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2015-01-15T04:11:06Z",
    "title_canon_sha256": "776cdf4d30e4ef1506e5d56eed07eb017360d378fbc5d3109416f62d9e0cfeac"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.03566",
    "kind": "arxiv",
    "version": 2
  }
}