Pith Number

pith:BSNUXKZW

pith:2012:BSNUXKZW4CKVSHIETPDRVSRR2Q

not attested not anchored not stored refs pending

On two conjectures of Maurer concerning basis graphs of matroids

Damian Osajda, J\'er\'emie Chalopin, Victor Chepoi

arxiv:1212.6879 v2 · 2012-12-31 · math.CO · cs.DM

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BSNUXKZW4CKVSHIETPDRVSRR2Q}

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	2026-05-17T23:58:55.014178Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0c9b4bab36e095591d049bc71aca31d408499b1d8bda11cc02bf2f9b28cc3aa1

Aliases

arxiv: 1212.6879 · arxiv_version: 1212.6879v2 · doi: 10.48550/arxiv.1212.6879 · pith_short_12: BSNUXKZW4CKV · pith_short_16: BSNUXKZW4CKVSHIE · pith_short_8: BSNUXKZW

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/BSNUXKZW4CKVSHIETPDRVSRR2Q \
  | 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: 0c9b4bab36e095591d049bc71aca31d408499b1d8bda11cc02bf2f9b28cc3aa1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "31ffa90f97988395fc0830559d6ffd7edca9a111386fda5a7b4e9dcc197dc025",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2012-12-31T12:34:54Z",
    "title_canon_sha256": "e5f490576274fd58c0b7bce8c59c9269ea88653bf6f70f6af8c5b4ead4e41a6f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.6879",
    "kind": "arxiv",
    "version": 2
  }
}