Pith Number

pith:HWVBLAQ2

pith:2005:HWVBLAQ2XLOA7ZNLQC6K3Y6HHD

not attested not anchored not stored refs pending

A Simple Model to Generate Hard Satisfiable Instances

Christophe Lecoutre, Frederic Boussemart, Fred Hemery, Ke Xu

arxiv:cs/0509032 v1 · 2005-09-12 · cs.AI · cond-mat.stat-mech · 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{HWVBLAQ2XLOA7ZNLQC6K3Y6HHD}

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	2026-05-18T01:06:49.052355Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3daa15821abadc0fe5ab80bcade3c738c083dc32d06c98a59dbf876fd7f11f96

Aliases

arxiv: cs/0509032 · arxiv_version: cs/0509032v1 · doi: 10.48550/arxiv.cs/0509032 · pith_short_12: HWVBLAQ2XLOA · pith_short_16: HWVBLAQ2XLOA7ZNL · pith_short_8: HWVBLAQ2

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/HWVBLAQ2XLOA7ZNLQC6K3Y6HHD \
  | 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: 3daa15821abadc0fe5ab80bcade3c738c083dc32d06c98a59dbf876fd7f11f96

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "086c61a3f6039b97615a49f8a1089a485abefab3646948674241e4c78c0e87e6",
    "cross_cats_sorted": [
      "cond-mat.stat-mech",
      "cs.CC"
    ],
    "license": "",
    "primary_cat": "cs.AI",
    "submitted_at": "2005-09-12T13:30:16Z",
    "title_canon_sha256": "7ec19464f325f6aeb165e263c87a4c35431693fa59973f71b5cecd843a212a77"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/0509032",
    "kind": "arxiv",
    "version": 1
  }
}