Pith Number

pith:U43HIJQM

pith:2013:U43HIJQMSH43KOGVP53BFT6MG5

not attested not anchored not stored refs pending

Squaring the magic squares of order 4

Nadir Murru, Stefano Barbero, Umberto Cerruti

arxiv:1302.1163 v1 · 2013-02-05 · math.NT

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{U43HIJQMSH43KOGVP53BFT6MG5}

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	2026-05-18T03:34:26.039991Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a73674260c91f9b538d57f7612cfcc376e70c0cdda9cd55fff59d8ccf1edfbdf

Aliases

arxiv: 1302.1163 · arxiv_version: 1302.1163v1 · doi: 10.48550/arxiv.1302.1163 · pith_short_12: U43HIJQMSH43 · pith_short_16: U43HIJQMSH43KOGV · pith_short_8: U43HIJQM

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/U43HIJQMSH43KOGVP53BFT6MG5 \
  | 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: a73674260c91f9b538d57f7612cfcc376e70c0cdda9cd55fff59d8ccf1edfbdf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b40a0eccb1df5e1cc3877a33b7f4fcfc4888d4650a1498c6fcc2402881a1bcd7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NT",
    "submitted_at": "2013-02-05T19:38:39Z",
    "title_canon_sha256": "f3b35e38a9f7cfdd05df10b8048cdc1414a42f81a23692bf2bc897ece17aea59"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.1163",
    "kind": "arxiv",
    "version": 1
  }
}