Pith Number

pith:BB7JPTWF

pith:2015:BB7JPTWFOZ6D7655UZMEBEM5GA

not attested not anchored not stored refs pending

Even pairs in square-free Berge graphs with no odd prism

Fr\'ed\'eric Maffray

arxiv:1502.03695 v1 · 2015-02-12 · 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{BB7JPTWFOZ6D7655UZMEBEM5GA}

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	2026-05-18T02:27:17.023113Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

087e97cec5767c3ffbbda65840919d300da1b1b8a195ecfa3353c1cd2910bc19

Aliases

arxiv: 1502.03695 · arxiv_version: 1502.03695v1 · doi: 10.48550/arxiv.1502.03695 · pith_short_12: BB7JPTWFOZ6D · pith_short_16: BB7JPTWFOZ6D7655 · pith_short_8: BB7JPTWF

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/BB7JPTWFOZ6D7655UZMEBEM5GA \
  | 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: 087e97cec5767c3ffbbda65840919d300da1b1b8a195ecfa3353c1cd2910bc19

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bcdf4c958ba912d7dd91813b68f61d4edf24696f148a2863ffa713b9a4a1abb9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-02-12T15:09:57Z",
    "title_canon_sha256": "cd9b5267cba622f1c9bcb18ca152dfaba575c71841b4865b6968e93e15612d6d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.03695",
    "kind": "arxiv",
    "version": 1
  }
}