Pith Number

pith:NP4IOOMA

pith:1999:NP4IOOMA36AR55CF7GVCJC6BW2

not attested not anchored not stored refs pending

Bell's inequality for a single spin 1/2 particle and quantum contextuality

Dipankar Home, Guruprasad Kar, Sayandeb Basu, Somshubhro Bandyopadhyay

arxiv:quant-ph/9907030 v3 · 1999-07-08 · 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{NP4IOOMA36AR55CF7GVCJC6BW2}

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	2026-05-18T01:37:52.424626Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6bf8873980df811ef445f9aa248bc1b6baaff23e9f3b43b689c7df299b2c4838

Aliases

arxiv: quant-ph/9907030 · arxiv_version: quant-ph/9907030v3 · doi: 10.48550/arxiv.quant-ph/9907030 · pith_short_12: NP4IOOMA36AR · pith_short_16: NP4IOOMA36AR55CF · pith_short_8: NP4IOOMA

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/NP4IOOMA36AR55CF7GVCJC6BW2 \
  | 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: 6bf8873980df811ef445f9aa248bc1b6baaff23e9f3b43b689c7df299b2c4838

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5df0b0fc494109953f82e12235e17b3b72f4bfd71fd83543cd4cd3b3fa178507",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "1999-07-08T13:59:18Z",
    "title_canon_sha256": "8ae70703a0cebd03ff9f55c3cedcb1cd258c322b5b55e598de60c8daaff7f276"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/9907030",
    "kind": "arxiv",
    "version": 3
  }
}