Pith Number

pith:WUMTSXPC

pith:2011:WUMTSXPC6YFBDWWKFNMRDHA5VB

not attested not anchored not stored refs pending

Deciding first order logic properties of matroids

Daniel Kral, Sang-il Oum, Tomas Gavenciak

arxiv:1108.5457 v1 · 2011-08-27 · cs.DS · cs.DM · cs.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WUMTSXPC6YFBDWWKFNMRDHA5VB}

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	2026-05-18T04:14:37.476505Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b519395de2f60a11daca2b59119c1da8659130cfba67809c2163705e5881b637

Aliases

arxiv: 1108.5457 · arxiv_version: 1108.5457v1 · doi: 10.48550/arxiv.1108.5457 · pith_short_12: WUMTSXPC6YFB · pith_short_16: WUMTSXPC6YFBDWWK · pith_short_8: WUMTSXPC

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/WUMTSXPC6YFBDWWKFNMRDHA5VB \
  | 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: b519395de2f60a11daca2b59119c1da8659130cfba67809c2163705e5881b637

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1b3001aae595bcc2015421f9a7e9807088e2e9b8a19e979ac63bc9042066ec34",
    "cross_cats_sorted": [
      "cs.DM",
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2011-08-27T15:02:37Z",
    "title_canon_sha256": "3460cabd6fe639a5004cf43de83f601ccb9799ea6c277120205ebc5250bc871d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1108.5457",
    "kind": "arxiv",
    "version": 1
  }
}