Pith Number

pith:2DFNEJWC

pith:2012:2DFNEJWCGTA4QKTRQIEK2NRRLL

not attested not anchored not stored refs pending

Super-simple 2-(v; 5; 1) directed designs and their smallest defining sets

Farzane Amirzade, Nasrin Soltankhah

arxiv:1205.6047 v2 · 2012-05-28 · 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{2DFNEJWCGTA4QKTRQIEK2NRRLL}

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	2026-05-18T03:51:35.062848Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d0cad226c234c1c82a718208ad36315af29ff21e08415f69c98c012399cf3658

Aliases

arxiv: 1205.6047 · arxiv_version: 1205.6047v2 · doi: 10.48550/arxiv.1205.6047 · pith_short_12: 2DFNEJWCGTA4 · pith_short_16: 2DFNEJWCGTA4QKTR · pith_short_8: 2DFNEJWC

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/2DFNEJWCGTA4QKTRQIEK2NRRLL \
  | 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: d0cad226c234c1c82a718208ad36315af29ff21e08415f69c98c012399cf3658

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0490aae262536f15caebfedbde64be4a0c47f803619cd0a17d51699930ed14ea",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2012-05-28T08:05:52Z",
    "title_canon_sha256": "85acd0d0e5b46c1e403291dd3c363a91402885450321548ee060565bf11565ee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.6047",
    "kind": "arxiv",
    "version": 2
  }
}