Pith Number

pith:FISCFWD3

pith:2011:FISCFWD3HDAH3AFY5KCEQN6T6U

not attested not anchored not stored refs pending

Some families of directed strongly regular graphs obtained from certain finite incidence structures

Oktay Olmez, Sung Y. Song

arxiv:1102.1491 v1 · 2011-02-08 · 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{FISCFWD3HDAH3AFY5KCEQN6T6U}

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	2026-05-18T04:29:53.122791Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2a2422d87b38c07d80b8ea844837d3f5226bd491d775baece66bb13a3883f57c

Aliases

arxiv: 1102.1491 · arxiv_version: 1102.1491v1 · doi: 10.48550/arxiv.1102.1491 · pith_short_12: FISCFWD3HDAH · pith_short_16: FISCFWD3HDAH3AFY · pith_short_8: FISCFWD3

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/FISCFWD3HDAH3AFY5KCEQN6T6U \
  | 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: 2a2422d87b38c07d80b8ea844837d3f5226bd491d775baece66bb13a3883f57c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6e15ff1c866a8162e3e73eaf00d03971f6cfe5982f172ee7ab67a2ed57e9f80a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2011-02-08T02:20:27Z",
    "title_canon_sha256": "3ee8f0286382f6c318354b8d4db337dbec7e01ab97d8f1e40037378311db2f7a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.1491",
    "kind": "arxiv",
    "version": 1
  }
}