Pith Number

pith:OCJ4DWFU

pith:2010:OCJ4DWFUJZXSUHSKBKI43FWLYQ

not attested not anchored not stored refs pending

The smallest refrigerators can reach maximal efficiency

Nicolas Brunner, Noah Linden, Paul Skrzypczyk, Sandu Popescu

arxiv:1009.0865 v2 · 2010-09-04 · 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{OCJ4DWFUJZXSUHSKBKI43FWLYQ}

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	2026-05-18T04:07:08.033754Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7093c1d8b44e6f2a1e4a0a91cd96cbc43f7c7a9f29c308d8574c48586eef55d5

Aliases

arxiv: 1009.0865 · arxiv_version: 1009.0865v2 · doi: 10.48550/arxiv.1009.0865 · pith_short_12: OCJ4DWFUJZXS · pith_short_16: OCJ4DWFUJZXSUHSK · pith_short_8: OCJ4DWFU

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/OCJ4DWFUJZXSUHSKBKI43FWLYQ \
  | 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: 7093c1d8b44e6f2a1e4a0a91cd96cbc43f7c7a9f29c308d8574c48586eef55d5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1a2e8c6af3b8fcc3952795716c1195dd771aad6cd92c96df039595ea45aab9e9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2010-09-04T19:47:44Z",
    "title_canon_sha256": "b37c9dd097b4e9adba933687e0c5bdb235bdab0c056b972331db29c48dbaf465"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1009.0865",
    "kind": "arxiv",
    "version": 2
  }
}