Pith Number

pith:OVDSS3B2

pith:2016:OVDSS3B2M2XU22IMZIXBEYGU26

not attested not anchored not stored refs pending

Implementing Brouwer's database of strongly regular graphs

Dmitrii V. Pasechnik, Nathann Cohen

arxiv:1601.00181 v2 · 2016-01-02 · math.CO · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OVDSS3B2M2XU22IMZIXBEYGU26}

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	2026-05-18T00:41:02.286842Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7547296c3a66af4d690cca2e1260d4d7a9b49bcafc95f1b507d5e8af6e01cf27

Aliases

arxiv: 1601.00181 · arxiv_version: 1601.00181v2 · doi: 10.48550/arxiv.1601.00181 · pith_short_12: OVDSS3B2M2XU · pith_short_16: OVDSS3B2M2XU22IM · pith_short_8: OVDSS3B2

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/OVDSS3B2M2XU22IMZIXBEYGU26 \
  | 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: 7547296c3a66af4d690cca2e1260d4d7a9b49bcafc95f1b507d5e8af6e01cf27

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ca2e7d6a0bcd30d28d676fa8d61ad4a2e1688d64acb296fbe9f3414932b9053a",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2016-01-02T15:02:04Z",
    "title_canon_sha256": "e64557071d93ca3f5af0f9c3d5ed6adbafaafb3f68009e7b947e08ec679afbc4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.00181",
    "kind": "arxiv",
    "version": 2
  }
}