Pith Number

pith:WXRF2UA7

pith:2012:WXRF2UA7RSKWIK3UUMOLSAPH5H

not attested not anchored not stored refs pending

The internally 4-connected binary matroids with no M(K5\e)-minor

Dillon Mayhew, Gordon Royle

arxiv:1202.3843 v1 · 2012-02-17 · 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{WXRF2UA7RSKWIK3UUMOLSAPH5H}

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	2026-05-18T04:02:02.639578Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b5e25d501f8c95642b74a31cb901e7e9d06b9fc56077e8e61ea888a07e86dc3a

Aliases

arxiv: 1202.3843 · arxiv_version: 1202.3843v1 · doi: 10.48550/arxiv.1202.3843 · pith_short_12: WXRF2UA7RSKW · pith_short_16: WXRF2UA7RSKWIK3U · pith_short_8: WXRF2UA7

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/WXRF2UA7RSKWIK3UUMOLSAPH5H \
  | 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: b5e25d501f8c95642b74a31cb901e7e9d06b9fc56077e8e61ea888a07e86dc3a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d50a5ae642fb3e90aeb8d56033649f66ad03494dab973b6fe94c5cbe7fe8442c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2012-02-17T05:23:49Z",
    "title_canon_sha256": "a39d63749922f7023f36ba1bc0145fd459f8fc94b9d9608821e548f384377990"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.3843",
    "kind": "arxiv",
    "version": 1
  }
}