Pith Number

pith:DIWVNKWN

pith:2011:DIWVNKWNLXJOVD3PWJTGIQQU55

not attested not anchored not stored refs pending

Certifying Non-representability of Matroids Over Prime Fields

Geoff Whittle, Jim Geelen

arxiv:1101.4691 v1 · 2011-01-25 · 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{DIWVNKWNLXJOVD3PWJTGIQQU55}

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	2026-05-18T04:30:59.199916Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1a2d56aacd5dd2ea8f6fb266644214ef425d2d2166a863111907c9c44684802f

Aliases

arxiv: 1101.4691 · arxiv_version: 1101.4691v1 · doi: 10.48550/arxiv.1101.4691 · pith_short_12: DIWVNKWNLXJO · pith_short_16: DIWVNKWNLXJOVD3P · pith_short_8: DIWVNKWN

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/DIWVNKWNLXJOVD3PWJTGIQQU55 \
  | 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: 1a2d56aacd5dd2ea8f6fb266644214ef425d2d2166a863111907c9c44684802f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b88c7c4d79efc348331fdb0af130f834d1e71f5295fe2ccd92fcbf5f8fbb4c80",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2011-01-25T00:12:34Z",
    "title_canon_sha256": "167ee1567faa4b04626cdbf8768cf62311f552af01bdf3adc819158718900a1e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1101.4691",
    "kind": "arxiv",
    "version": 1
  }
}