Pith Number

pith:75XKIBQX

pith:2011:75XKIBQXN7KDT4FR4UPYEKDTYH

not attested not anchored not stored refs pending

Inequivalent Representations of Matroids over Prime Fields

Geoff Whittle, Jim Geelen

arxiv:1101.4683 v1 · 2011-01-24 · 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{75XKIBQXN7KDT4FR4UPYEKDTYH}

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	2026-05-18T04:30:59.219701Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ff6ea406176fd439f0b1e51f822873c1dc625b255492255c6e1e72dd3c77cf73

Aliases

arxiv: 1101.4683 · arxiv_version: 1101.4683v1 · doi: 10.48550/arxiv.1101.4683 · pith_short_12: 75XKIBQXN7KD · pith_short_16: 75XKIBQXN7KDT4FR · pith_short_8: 75XKIBQX

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/75XKIBQXN7KDT4FR4UPYEKDTYH \
  | 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: ff6ea406176fd439f0b1e51f822873c1dc625b255492255c6e1e72dd3c77cf73

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f4175c9fcb4cd43ce59c9e82973d60c79e997c3ff444263968124ad71dafe04c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2011-01-24T22:49:31Z",
    "title_canon_sha256": "4bb69876ead4c45c3ff89e50d4bbdbd02e49034b577ddda9ff89d4726251f9b8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1101.4683",
    "kind": "arxiv",
    "version": 1
  }
}