Pith Number

pith:LIIIXASK

pith:2013:LIIIXASKZVD4VYKJAXCFY66LPL

not attested not anchored not stored refs pending

L\"{u}ders Theorem for Unsharp Quantum Measurements

Javed Singh, Paul Busch

arxiv:1304.0054 v1 · 2013-03-30 · 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{LIIIXASKZVD4VYKJAXCFY66LPL}

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	2026-05-18T03:29:26.193540Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5a108b824acd47cae14905c45c7bcb7ac19d8e62929f8bd51210393c6dafe844

Aliases

arxiv: 1304.0054 · arxiv_version: 1304.0054v1 · doi: 10.48550/arxiv.1304.0054 · pith_short_12: LIIIXASKZVD4 · pith_short_16: LIIIXASKZVD4VYKJ · pith_short_8: LIIIXASK

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/LIIIXASKZVD4VYKJAXCFY66LPL \
  | 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: 5a108b824acd47cae14905c45c7bcb7ac19d8e62929f8bd51210393c6dafe844

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a849b5bcd0ba164d6a6f666699ed6e4fb43338538461c7b6f808d0688e8eb7f4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2013-03-30T00:47:50Z",
    "title_canon_sha256": "47307a3f6be63d0d3a9427b8ceba80be0544d0115a18f222f5cd2873eaea0fbe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.0054",
    "kind": "arxiv",
    "version": 1
  }
}