Pith Number

pith:2QS7YR6V

pith:2013:2QS7YR6VK5PGM3DZWJRG65IQHT

not attested not anchored not stored refs pending

Construction of Directed Strongly Regular Graphs Using Block Matrices

Alexandra Gendreau, Francis Adams, Oktay Olmez, Sung Yell Song

arxiv:1311.0494 v1 · 2013-11-03 · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2QS7YR6VK5PGM3DZWJRG65IQHT}

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	2026-05-18T03:08:05.754926Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d425fc47d5575e666c79b2626f75103ce7105ef37770dabb13ebc1a705589826

Aliases

arxiv: 1311.0494 · arxiv_version: 1311.0494v1 · doi: 10.48550/arxiv.1311.0494 · pith_short_12: 2QS7YR6VK5PG · pith_short_16: 2QS7YR6VK5PGM3DZ · pith_short_8: 2QS7YR6V

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/2QS7YR6VK5PGM3DZWJRG65IQHT \
  | 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: d425fc47d5575e666c79b2626f75103ce7105ef37770dabb13ebc1a705589826

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f1d3b0faf8973373d85b2f73cbe3bf6d4dea13714c399e283dd55ee311803329",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2013-11-03T17:10:32Z",
    "title_canon_sha256": "44621fd92aa290b960d2094854affc2dae96f52247f46ff36ebcbe29fd725e05"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.0494",
    "kind": "arxiv",
    "version": 1
  }
}