Pith Number

pith:WOF6SVJG

pith:2009:WOF6SVJGERKZQVQWHQAKCKNRGM

not attested not anchored not stored refs pending

Tile Packing Tomography is NP-hard

Antoni Lozano, Christoph Durr, Flavio Guinez, Marek Chrobak, Nguyen Kim Thang

arxiv:0911.2567 v2 · 2009-11-13 · cs.CC · 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{WOF6SVJGERKZQVQWHQAKCKNRGM}

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	2026-05-18T04:32:54.598985Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b38be9552624559856163c00a129b13332d4df503aa9883f3d19662db11372e0

Aliases

arxiv: 0911.2567 · arxiv_version: 0911.2567v2 · doi: 10.48550/arxiv.0911.2567 · pith_short_12: WOF6SVJGERKZ · pith_short_16: WOF6SVJGERKZQVQW · pith_short_8: WOF6SVJG

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/WOF6SVJGERKZQVQWHQAKCKNRGM \
  | 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: b38be9552624559856163c00a129b13332d4df503aa9883f3d19662db11372e0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e1a165de1635c82714c40fb8754cfc734e90d4999f6a5c191c04acf6e3f4dac0",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2009-11-13T08:54:27Z",
    "title_canon_sha256": "cb5759233b00fb5ca3f6850d80afe4ac86eeac5398dba1ba0746cafad849bb4c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.2567",
    "kind": "arxiv",
    "version": 2
  }
}