Pith Number

pith:JZEKBS2Z

pith:2009:JZEKBS2ZKU66LZP3MYRD6UP4IP

not attested not anchored not stored refs pending

When a quantum measurement can be implemented locally ... and when it cannot

Scott M. Cohen

arxiv:0912.1607 v3 · 2009-12-08 · 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{JZEKBS2ZKU66LZP3MYRD6UP4IP}

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	2026-05-18T02:45:48.958777Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4e48a0cb59553de5e5fb66223f51fc43d65a3e14c198341b0e00d2e8976418b6

Aliases

arxiv: 0912.1607 · arxiv_version: 0912.1607v3 · doi: 10.48550/arxiv.0912.1607 · pith_short_12: JZEKBS2ZKU66 · pith_short_16: JZEKBS2ZKU66LZP3 · pith_short_8: JZEKBS2Z

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/JZEKBS2ZKU66LZP3MYRD6UP4IP \
  | 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: 4e48a0cb59553de5e5fb66223f51fc43d65a3e14c198341b0e00d2e8976418b6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c3076f13c856a540bb078208bf0236748e1c3e15c9eee66e59453df37fe2575b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-12-08T21:10:10Z",
    "title_canon_sha256": "58ea78ef3fb9cc2ab545be27f0b8f74c8bafcb8833181a9b3258a625d05fcfc5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.1607",
    "kind": "arxiv",
    "version": 3
  }
}