Pith Number

pith:6U2WGZPM

pith:2012:6U2WGZPMWTJCCBJ6BGBGNT26K6

not attested not anchored not stored refs pending

Is the missing axiom of matroid theory lost forever?

Dillon Mayhew, Geoff Whittle, Mike Newman

arxiv:1204.3365 v2 · 2012-04-16 · 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{6U2WGZPMWTJCCBJ6BGBGNT26K6}

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	2026-05-18T01:20:54.175912Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f5356365ecb4d221053e098266cf5e57899fdb3bcef848016de7c0af06b3ee20

Aliases

arxiv: 1204.3365 · arxiv_version: 1204.3365v2 · doi: 10.48550/arxiv.1204.3365 · pith_short_12: 6U2WGZPMWTJC · pith_short_16: 6U2WGZPMWTJCCBJ6 · pith_short_8: 6U2WGZPM

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/6U2WGZPMWTJCCBJ6BGBGNT26K6 \
  | 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: f5356365ecb4d221053e098266cf5e57899fdb3bcef848016de7c0af06b3ee20

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d7d8c1838d81d4f92cac1f12f501bd91a4b632c86f31f0a80fc361058ee98e9d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2012-04-16T05:36:15Z",
    "title_canon_sha256": "4ce462dd36d89603d83f0ee257c972fcfd917160b1a7e3613b9f5003b9b8a0ba"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.3365",
    "kind": "arxiv",
    "version": 2
  }
}