Pith Number

pith:5JVCBVTO

pith:2007:5JVCBVTOGRBPLXTLUG53QZZZXW

not attested not anchored not stored refs pending

On the expressive power of planar perfect matching and permanents of bounded treewidth matrices

Laurent Lyaudet (LIP), Pascal Koiran (LIP), Uffe Flarup (IMADA)

arxiv:0705.3751 v1 · 2007-05-25 · cs.DM · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5JVCBVTOGRBPLXTLUG53QZZZXW}

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	2026-07-04T15:02:10.685047Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ea6a20d66e3442f5de6ba1bbb86739bd87916b6b6687591945138c975841fa0b

Aliases

arxiv: 0705.3751 · arxiv_version: 0705.3751v1 · doi: 10.48550/arxiv.0705.3751 · pith_short_12: 5JVCBVTOGRBP · pith_short_16: 5JVCBVTOGRBPLXTL · pith_short_8: 5JVCBVTO

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/5JVCBVTOGRBPLXTLUG53QZZZXW \
  | 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: ea6a20d66e3442f5de6ba1bbb86739bd87916b6b6687591945138c975841fa0b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a0a0205fb96871c2c72b13252d1ffcd877914f1ecb6675444ef42523306eaa20",
    "cross_cats_sorted": [
      "cs.CC"
    ],
    "license": "",
    "primary_cat": "cs.DM",
    "submitted_at": "2007-05-25T11:34:13Z",
    "title_canon_sha256": "33362147ce24e0e04d6a57d76dc53f73bb9730c19c992a502c9ba0deded4a8a6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0705.3751",
    "kind": "arxiv",
    "version": 1
  }
}