Pith Number

pith:FCPMUJA2

pith:2017:FCPMUJA22FKZBXLRM4UF3C5MU7

not attested not anchored not stored refs pending

MILP and Max-Clique based heuristics for the Eternity II puzzle

Fabio Salassa, Federico Della Croce, Greet Vanden Berghe, Tony Wauters, Wim Vancroonenburg

arxiv:1709.00252 v2 · 2017-09-01 · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FCPMUJA22FKZBXLRM4UF3C5MU7}

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	2026-05-18T00:33:38.897171Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

289eca241ad15590dd7167285d8baca7e8dc629a0444ed81cc9dd771cc7a1336

Aliases

arxiv: 1709.00252 · arxiv_version: 1709.00252v2 · doi: 10.48550/arxiv.1709.00252 · pith_short_12: FCPMUJA22FKZ · pith_short_16: FCPMUJA22FKZBXLR · pith_short_8: FCPMUJA2

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/FCPMUJA22FKZBXLRM4UF3C5MU7 \
  | 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: 289eca241ad15590dd7167285d8baca7e8dc629a0444ed81cc9dd771cc7a1336

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "521d595c5298fb5d2a62d35e4ec7bd24fb6e7a49750aefa935b181e8b919a940",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2017-09-01T11:27:55Z",
    "title_canon_sha256": "2c293c5d52eafb623dac0eb3d640039925582fd9849ab0e47e87870db4fa7c0e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1709.00252",
    "kind": "arxiv",
    "version": 2
  }
}