Pith Number

pith:V7TZKVLF

pith:2015:V7TZKVLFGU5U6VJZNBKSKYEY4I

not attested not anchored not stored refs pending

Device-Independent Tests of Entropy

Jonatan Bohr Brask, Nicolas Brunner, Rafael Chaves

arxiv:1505.07802 v1 · 2015-05-28 · 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{V7TZKVLFGU5U6VJZNBKSKYEY4I}

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	2026-05-18T01:33:43.105384Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

afe7955565353b4f55396855256098e20afecb1f93b38792f4724265a2df1898

Aliases

arxiv: 1505.07802 · arxiv_version: 1505.07802v1 · doi: 10.48550/arxiv.1505.07802 · pith_short_12: V7TZKVLFGU5U · pith_short_16: V7TZKVLFGU5U6VJZ · pith_short_8: V7TZKVLF

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/V7TZKVLFGU5U6VJZNBKSKYEY4I \
  | 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: afe7955565353b4f55396855256098e20afecb1f93b38792f4724265a2df1898

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b5afcf1f0bbfcd677a2da58639a593773184b9a7ccdf222cbd7bf89e2f52d027",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2015-05-28T19:12:06Z",
    "title_canon_sha256": "4eccb1bb1e165ab08dffa5071fbfbf1196f761de7a139bd16bf678f076e2881d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1505.07802",
    "kind": "arxiv",
    "version": 1
  }
}