Pith Number

pith:HQNFL3SW

pith:2018:HQNFL3SWGI3JYIJKDE5BHUBU3K

not attested not anchored not stored refs pending

The perfect matching association scheme

Murali K. Srinivasan

arxiv:1807.00481 v1 · 2018-07-02 · 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{HQNFL3SWGI3JYIJKDE5BHUBU3K}

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	2026-05-18T00:11:52.502343Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3c1a55ee5632369c212a193a13d034daab38b30e2cbc38a2a564a14748586290

Aliases

arxiv: 1807.00481 · arxiv_version: 1807.00481v1 · doi: 10.48550/arxiv.1807.00481 · pith_short_12: HQNFL3SWGI3J · pith_short_16: HQNFL3SWGI3JYIJK · pith_short_8: HQNFL3SW

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/HQNFL3SWGI3JYIJKDE5BHUBU3K \
  | 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: 3c1a55ee5632369c212a193a13d034daab38b30e2cbc38a2a564a14748586290

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "08508f1946826376804697c4cc4011fa7c4937987a9afdf4d596d80d84167148",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-07-02T06:25:35Z",
    "title_canon_sha256": "b150f277d4e7a6c9fbb778b99a529db0099f662ab000344a01aaa684218233a0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.00481",
    "kind": "arxiv",
    "version": 1
  }
}