Pith Number

pith:YY6JPZ3Y

pith:2008:YY6JPZ3Y4VPSCOOEP7E2TPUOY4

not attested not anchored not stored refs pending

The Quantum Locker Puzzle

Anne Broadbent, David Avis

arxiv:0812.2242 v2 · 2008-12-11 · quant-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YY6JPZ3Y4VPSCOOEP7E2TPUOY4}

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	2026-05-18T04:01:51.417867Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c63c97e778e55f2139c47fc9a9be8ec71d11baf20e0100d779e7a3aaba23e309

Aliases

arxiv: 0812.2242 · arxiv_version: 0812.2242v2 · doi: 10.48550/arxiv.0812.2242 · pith_short_12: YY6JPZ3Y4VPS · pith_short_16: YY6JPZ3Y4VPSCOOE · pith_short_8: YY6JPZ3Y

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/YY6JPZ3Y4VPSCOOEP7E2TPUOY4 \
  | 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: c63c97e778e55f2139c47fc9a9be8ec71d11baf20e0100d779e7a3aaba23e309

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a9d2385f7254ba65f532e391d49bf53499385d5047bc38eef5d737985e703531",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2008-12-11T20:59:10Z",
    "title_canon_sha256": "4248487d9a40a1f95fed2ee5ccc6bff3f8901799f8903750ec6842a278d111e8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0812.2242",
    "kind": "arxiv",
    "version": 2
  }
}