Pith Number

pith:6VNC7CNE

pith:2016:6VNC7CNEKEHPWH47MDXSJ3VIPC

not attested not anchored not stored refs pending

Partial Covering Arrays: Algorithms and Asymptotics

Annalisa De Bonis, Charles J. Colbourn, Kaushik Sarkar, Ugo Vaccaro

arxiv:1605.02131 v1 · 2016-05-07 · math.CO · cs.DM

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

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	2026-05-18T01:15:21.998715Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f55a2f89a4510efb1f9f60ef24eea8788d6964eefd0c999c60c2cce1431953bc

Aliases

arxiv: 1605.02131 · arxiv_version: 1605.02131v1 · doi: 10.48550/arxiv.1605.02131 · pith_short_12: 6VNC7CNEKEHP · pith_short_16: 6VNC7CNEKEHPWH47 · pith_short_8: 6VNC7CNE

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/6VNC7CNEKEHPWH47MDXSJ3VIPC \
  | 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: f55a2f89a4510efb1f9f60ef24eea8788d6964eefd0c999c60c2cce1431953bc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2e6c52d2d0d94524d2ff4f196da12d843b3f398c1249eb8a402818d395c1c0bd",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2016-05-07T02:09:26Z",
    "title_canon_sha256": "0efeba9ed595226eb3037b592d766c4672a31de02e249bb3aea36cd0b655d376"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1605.02131",
    "kind": "arxiv",
    "version": 1
  }
}