Pith Number

pith:QGBK27FA

pith:2023:QGBK27FATOF3X6XW7XPT5UEY2P

not attested not anchored not stored refs pending

Computing excluded minors for classes of matroids representable over partial fields

Nick Brettell, Rudi Pendavingh

arxiv:2302.13175 v2 · 2023-02-25 · 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{QGBK27FATOF3X6XW7XPT5UEY2P}

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	2026-07-05T08:58:39.554001Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8182ad7ca09b8bbbfaf6fddf3ed098d3e05d6cd54103f9bc7d243e0269f6b178

Aliases

arxiv: 2302.13175 · arxiv_version: 2302.13175v2 · doi: 10.48550/arxiv.2302.13175 · pith_short_12: QGBK27FATOF3 · pith_short_16: QGBK27FATOF3X6XW · pith_short_8: QGBK27FA

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/QGBK27FATOF3X6XW7XPT5UEY2P \
  | 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: 8182ad7ca09b8bbbfaf6fddf3ed098d3e05d6cd54103f9bc7d243e0269f6b178

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a3001ab690df4dd24c7f7374daf80b9e4346e08ada9cf6080304615680849dca",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2023-02-25T22:03:30Z",
    "title_canon_sha256": "758c98b85f35de27600d2367dff3de738cbd1833d806234e5e0b4e1eeb2bd99f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2302.13175",
    "kind": "arxiv",
    "version": 2
  }
}