Pith Number

pith:KDXTTBON

pith:2014:KDXTTBONM6KTU72IS7CWGH42UG

not attested not anchored not stored refs pending

Matroids representable over fields with a common subfield

Peter Nelson, Stefan H.M. van Zwam

arxiv:1401.7040 v1 · 2014-01-27 · 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{KDXTTBONM6KTU72IS7CWGH42UG}

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	2026-05-18T03:00:51.019037Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

50ef3985cd67953a7f4897c5631f9aa1aa8ae0585719c03d1a13205a14121c9e

Aliases

arxiv: 1401.7040 · arxiv_version: 1401.7040v1 · doi: 10.48550/arxiv.1401.7040 · pith_short_12: KDXTTBONM6KT · pith_short_16: KDXTTBONM6KTU72I · pith_short_8: KDXTTBON

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/KDXTTBONM6KTU72IS7CWGH42UG \
  | 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: 50ef3985cd67953a7f4897c5631f9aa1aa8ae0585719c03d1a13205a14121c9e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cb0e0fc633a639053510c4d179094e55a1fe150eb2ce8efe4ffedcd0b7e841f1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2014-01-27T22:30:35Z",
    "title_canon_sha256": "b6244d7a429fbe39672fb1643d615aeec1d714ec5e40788a2d66bc81db04f735"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.7040",
    "kind": "arxiv",
    "version": 1
  }
}