Pith Number

pith:MB5FMFNO

pith:2007:MB5FMFNOCTGVSPUCVLCWX4AOEX

not attested not anchored not stored refs pending

The Complexity of Model Checking Higher-Order Fixpoint Logic

Martin Lange, Rafal Somla, Roland Axelsson

arxiv:0704.3931 v2 · 2007-04-30 · 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{MB5FMFNOCTGVSPUCVLCWX4AOEX}

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	2026-05-18T01:37:42.766632Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

607a5615ae14cd593e82aac56bf00e25f686d60172893395b02de9a366f6ea37

Aliases

arxiv: 0704.3931 · arxiv_version: 0704.3931v2 · doi: 10.48550/arxiv.0704.3931 · pith_short_12: MB5FMFNOCTGV · pith_short_16: MB5FMFNOCTGVSPUC · pith_short_8: MB5FMFNO

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/MB5FMFNOCTGVSPUCVLCWX4AOEX \
  | 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: 607a5615ae14cd593e82aac56bf00e25f686d60172893395b02de9a366f6ea37

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "420cf3f2093d613cde33fa15c70dbe8e1f4a32e3292111018d652e712a168a6a",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "cs.LO",
    "submitted_at": "2007-04-30T13:09:20Z",
    "title_canon_sha256": "558663969a96e9824fe364fdf99585884400d236abbfd94befe502b05d4e9108"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0704.3931",
    "kind": "arxiv",
    "version": 2
  }
}