Pith Number

pith:EPRTXUGZ

pith:2011:EPRTXUGZXQNLQ2B4KG3A6M2LVI

not attested not anchored not stored refs pending

Uniqueness of certain completely regular Hadamard codes

Cheryl E. Praeger, Neil I. Gillespie

arxiv:1112.1247 v3 · 2011-12-06 · 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{EPRTXUGZXQNLQ2B4KG3A6M2LVI}

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	2026-05-18T02:54:47.369730Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

23e33bd0d9bc1ab8683c51b60f334baa1d1805b4035dff4a17d2a46b3bfcdc6f

Aliases

arxiv: 1112.1247 · arxiv_version: 1112.1247v3 · doi: 10.48550/arxiv.1112.1247 · pith_short_12: EPRTXUGZXQNL · pith_short_16: EPRTXUGZXQNLQ2B4 · pith_short_8: EPRTXUGZ

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/EPRTXUGZXQNLQ2B4KG3A6M2LVI \
  | 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: 23e33bd0d9bc1ab8683c51b60f334baa1d1805b4035dff4a17d2a46b3bfcdc6f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c3f18df650e2975a51e238ecd60c192ea9f29e41df50a2d3cd9839cdecb5738b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2011-12-06T12:05:47Z",
    "title_canon_sha256": "0b7d8202a9f8284be5891ffbe62102d7913c7f5c0f5196302120fe5bb35b9cc3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.1247",
    "kind": "arxiv",
    "version": 3
  }
}