Pith Number

pith:LSNWW5B4

pith:2002:LSNWW5B4OGSU2THLIQNUXECRRX

not attested not anchored not stored refs pending

The quantum measurement problem enhanced

Gebhard Gruebl

arxiv:quant-ph/0202101 v1 · 2002-02-19 · 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{LSNWW5B4OGSU2THLIQNUXECRRX}

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	2026-05-18T04:35:57.605687Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5c9b6b743c71a54d4ceb441b4b90518dd4a15d02e2bc0cff3102c6ae5da61626

Aliases

arxiv: quant-ph/0202101 · arxiv_version: quant-ph/0202101v1 · doi: 10.48550/arxiv.quant-ph/0202101 · pith_short_12: LSNWW5B4OGSU · pith_short_16: LSNWW5B4OGSU2THL · pith_short_8: LSNWW5B4

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/LSNWW5B4OGSU2THLIQNUXECRRX \
  | 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: 5c9b6b743c71a54d4ceb441b4b90518dd4a15d02e2bc0cff3102c6ae5da61626

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a437ef668868713e8a5529cf8c780495eba1b1cfbb5cf4a90f7d99ab2badb592",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2002-02-19T15:02:35Z",
    "title_canon_sha256": "033fd8731152229e727815fcbc96a112b43fda37ca7dde49012b1ebe4ae0b3da"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0202101",
    "kind": "arxiv",
    "version": 1
  }
}