Pith Number

pith:CMWCSEK5

pith:2015:CMWCSEK5GGQ22BQGEXSHSY4QIT

not attested not anchored not stored refs pending

Internally Perfect Matroids

Aaron Dall

arxiv:1510.04532 v2 · 2015-10-15 · 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{CMWCSEK5GGQ22BQGEXSHSY4QIT}

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	2026-05-18T00:42:13.507372Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

132c29115d31a1ad060625e479639044f767e1b38cf207a60430d4fc3d0d8ff5

Aliases

arxiv: 1510.04532 · arxiv_version: 1510.04532v2 · doi: 10.48550/arxiv.1510.04532 · pith_short_12: CMWCSEK5GGQ2 · pith_short_16: CMWCSEK5GGQ22BQG · pith_short_8: CMWCSEK5

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/CMWCSEK5GGQ22BQGEXSHSY4QIT \
  | 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: 132c29115d31a1ad060625e479639044f767e1b38cf207a60430d4fc3d0d8ff5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6fd7e825e931339b51c68c3b5d3abf0663f3c8531358edc3645135facb9d6483",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-10-15T13:39:06Z",
    "title_canon_sha256": "03fb12337b283534384de3e37d99a76bec5abc16d5b413937da610d153f14d35"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.04532",
    "kind": "arxiv",
    "version": 2
  }
}