Pith Number

pith:44MZHHGW

pith:2015:44MZHHGW7A5G6GLBV76A6V4QZY

not attested not anchored not stored refs pending

When are finite projective planes magic?

David Nash, Jonathan Needleman

arxiv:1502.02623 v2 · 2015-02-09 · 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{44MZHHGW7A5G6GLBV76A6V4QZY}

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	2026-05-18T01:23:04.264368Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e719939cd6f83a6f1961affc0f5790ce30b2c90a628928ba66f7d4e3c1bdcf05

Aliases

arxiv: 1502.02623 · arxiv_version: 1502.02623v2 · doi: 10.48550/arxiv.1502.02623 · pith_short_12: 44MZHHGW7A5G · pith_short_16: 44MZHHGW7A5G6GLB · pith_short_8: 44MZHHGW

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/44MZHHGW7A5G6GLBV76A6V4QZY \
  | 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: e719939cd6f83a6f1961affc0f5790ce30b2c90a628928ba66f7d4e3c1bdcf05

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aec1658f0d6ec3535cadd91d62521d9aaf7ff42068840a171bd1938c735697e5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-02-09T19:38:08Z",
    "title_canon_sha256": "d09f99fd2fd63d4af2ad46a920f68cb2e657eb1093f382bc45e4be57738a7a3e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.02623",
    "kind": "arxiv",
    "version": 2
  }
}