Pith Number

pith:2PNGFIJY

pith:1993:2PNGFIJYRXRJQOVCCX3AOZ33OA

not attested not anchored not stored refs pending

Causality Constraints on Nonlocal Quantum Measurements

Lev Vaidman, Sandu Popescu

arxiv:hep-th/9306087 v1 · 1993-06-18 · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2PNGFIJYRXRJQOVCCX3AOZ33OA}

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	2026-07-04T15:56:15.234898Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d3da62a1388de2983aa215f607677b703554a23311b08ce4073f78238ad3abeb

Aliases

arxiv: hep-th/9306087 · arxiv_version: hep-th/9306087v1 · doi: 10.48550/arxiv.hep-th/9306087 · pith_short_12: 2PNGFIJYRXRJ · pith_short_16: 2PNGFIJYRXRJQOVC · pith_short_8: 2PNGFIJY

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/2PNGFIJYRXRJQOVCCX3AOZ33OA \
  | 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: d3da62a1388de2983aa215f607677b703554a23311b08ce4073f78238ad3abeb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0335987ed0915c7eaa6d0f2d5ed8a535b1478eade16dbb913095a7e31f239c25",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "hep-th",
    "submitted_at": "1993-06-18T09:41:12Z",
    "title_canon_sha256": "ffdf8dd1a5826a12508a24f52bb937d1a6a1ffddeaf9b36a57a9f10d97b07ee3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "hep-th/9306087",
    "kind": "arxiv",
    "version": 1
  }
}