Pith Number

pith:OVD2XUAQ

pith:2014:OVD2XUAQZW4LC2737B4FGCQ7V4

not attested not anchored not stored refs pending

Strongly Regular Graphs as Laplacian Extremal Graphs

Chih-wen Weng, Fan-Hsuan Lin

arxiv:1411.6532 v1 · 2014-11-24 · 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{OVD2XUAQZW4LC2737B4FGCQ7V4}

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	2026-05-18T02:32:54.847044Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7547abd010cdb8b16bfbf878530a1faf1177032fe34a36c70da536e37bcf82a4

Aliases

arxiv: 1411.6532 · arxiv_version: 1411.6532v1 · doi: 10.48550/arxiv.1411.6532 · pith_short_12: OVD2XUAQZW4L · pith_short_16: OVD2XUAQZW4LC273 · pith_short_8: OVD2XUAQ

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/OVD2XUAQZW4LC2737B4FGCQ7V4 \
  | 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: 7547abd010cdb8b16bfbf878530a1faf1177032fe34a36c70da536e37bcf82a4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2695d4b427ad359003cb1d025c767e90bfcf0c411519b3aacb129360f3871a73",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2014-11-24T17:02:55Z",
    "title_canon_sha256": "4e74a88fa4df27c7eeecadb25ec71f32c17bce6491cc0842aeafc529fa71d415"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1411.6532",
    "kind": "arxiv",
    "version": 1
  }
}