Pith Number

pith:Q4FTTVVA

pith:2013:Q4FTTVVAYJBBE3NTGEQVUNJUP7

not attested not anchored not stored refs pending

Squares and Covering Matrices

Chris Lambie-Hanson

arxiv:1305.3629 v2 · 2013-05-15 · math.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q4FTTVVAYJBBE3NTGEQVUNJUP7}

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	2026-05-18T02:43:00.830541Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

870b39d6a0c242126db331215a35347ff212277501ac6ff5e4251ed27444f468

Aliases

arxiv: 1305.3629 · arxiv_version: 1305.3629v2 · doi: 10.48550/arxiv.1305.3629 · pith_short_12: Q4FTTVVAYJBB · pith_short_16: Q4FTTVVAYJBBE3NT · pith_short_8: Q4FTTVVA

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/Q4FTTVVAYJBBE3NTGEQVUNJUP7 \
  | 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: 870b39d6a0c242126db331215a35347ff212277501ac6ff5e4251ed27444f468

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6387b2e1da9aa1121e827787e2d401e320bae80df6304fc1eeca0000227c2137",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2013-05-15T20:30:19Z",
    "title_canon_sha256": "d5ea58ee83d8eec9425f9e0a3140e745db48554c4cdf9ad2a80e903fde27b9ff"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.3629",
    "kind": "arxiv",
    "version": 2
  }
}