Pith Number

pith:5JMDYF2K

pith:2012:5JMDYF2KFCIVH4J5RN2H75QJ7U

not attested not anchored not stored refs pending

The Canada Day Theorem

Daniel Gomez, Hans Lundmark, Jacek Szmigielski

arxiv:1206.4138 v2 · 2012-06-19 · 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{5JMDYF2KFCIVH4J5RN2H75QJ7U}

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	2026-05-18T03:34:35.490059Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ea583c174a289153f13d8b747ff609fd2cc48fdd084d04591be8ecbe2949ea11

Aliases

arxiv: 1206.4138 · arxiv_version: 1206.4138v2 · doi: 10.48550/arxiv.1206.4138 · pith_short_12: 5JMDYF2KFCIV · pith_short_16: 5JMDYF2KFCIVH4J5 · pith_short_8: 5JMDYF2K

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/5JMDYF2KFCIVH4J5RN2H75QJ7U \
  | 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: ea583c174a289153f13d8b747ff609fd2cc48fdd084d04591be8ecbe2949ea11

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3be28542ba160df3c31ea4b4bee6eaa2907c12dc5ffed7ff4782a63217498e70",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2012-06-19T08:10:45Z",
    "title_canon_sha256": "1ab20c86de45557d14840daab027ad1e9fc80943726502b8c4efae266a90fffc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1206.4138",
    "kind": "arxiv",
    "version": 2
  }
}