Pith Number

pith:FDF43DVC

pith:2012:FDF43DVCQEJCMRMDJH3IAL6XAY

not attested not anchored not stored refs pending

Matroids with an infinite circuit-cocircuit intersection

Johannes Carmesin, Nathan Bowler

arxiv:1202.3406 v2 · 2012-02-15 · 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{FDF43DVCQEJCMRMDJH3IAL6XAY}

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	2026-05-18T04:01:14.332931Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

28cbcd8ea2811226458349f6802fd7062df887813467a5aa6e65d3cc3318fd76

Aliases

arxiv: 1202.3406 · arxiv_version: 1202.3406v2 · doi: 10.48550/arxiv.1202.3406 · pith_short_12: FDF43DVCQEJC · pith_short_16: FDF43DVCQEJCMRMD · pith_short_8: FDF43DVC

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/FDF43DVCQEJCMRMDJH3IAL6XAY \
  | 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: 28cbcd8ea2811226458349f6802fd7062df887813467a5aa6e65d3cc3318fd76

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bb889d3a7b394e5ece136f21de412968d3189409f165378c78e04dc3a6c9a0ce",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2012-02-15T19:09:52Z",
    "title_canon_sha256": "0f2370e7a2a9f24943930d15c3185a1bafbc5f82cd7b6f0f51d6828e8f6b2f8e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.3406",
    "kind": "arxiv",
    "version": 2
  }
}