Pith Number

pith:KQ7C77SC

pith:2008:KQ7C77SCPGTAWAX65SHXOPGGJF

not attested not anchored not stored refs pending

Confinement of matroid representations to subsets of partial fields

R. A. Pendavingh, S. H. M. van Zwam

arxiv:0806.4487 v2 · 2008-06-27 · math.CO · math.RA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KQ7C77SCPGTAWAX65SHXOPGGJF}

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	2026-05-18T04:31:42.370819Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

543e2ffe4279a60b02feec8f773cc64946fe7006396d03c14ae5c5898622f1f9

Aliases

arxiv: 0806.4487 · arxiv_version: 0806.4487v2 · doi: 10.48550/arxiv.0806.4487 · pith_short_12: KQ7C77SCPGTA · pith_short_16: KQ7C77SCPGTAWAX6 · pith_short_8: KQ7C77SC

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/KQ7C77SCPGTAWAX65SHXOPGGJF \
  | 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: 543e2ffe4279a60b02feec8f773cc64946fe7006396d03c14ae5c5898622f1f9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bef7b91f1c1eef8703916daf5787acf9fdcd83356158083ce00af6e0c0b7bd0b",
    "cross_cats_sorted": [
      "math.RA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2008-06-27T11:10:47Z",
    "title_canon_sha256": "952454d6fcf7a8b126d87c9528f4a9574d0afcb7fe8188fce34a1b02c74743ae"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0806.4487",
    "kind": "arxiv",
    "version": 2
  }
}