Pith Number

pith:P7DQGAO2

pith:2005:P7DQGAO2GWKBZOAS6FR6RHMMGD

not attested not anchored not stored refs pending

Measurable entanglement

Alexander Klyachko, Alexander S. Shumovsky, Bar{\i}\c{s} \"Oztop

arxiv:quant-ph/0512197 v1 · 2005-12-22 · 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{P7DQGAO2GWKBZOAS6FR6RHMMGD}

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	2026-05-18T01:08:45.569460Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7fc70301da35941cb812f163e89d8c30e4c9e230beab22fe3a6b44d00bee2c8c

Aliases

arxiv: quant-ph/0512197 · arxiv_version: quant-ph/0512197v1 · doi: 10.48550/arxiv.quant-ph/0512197 · pith_short_12: P7DQGAO2GWKB · pith_short_16: P7DQGAO2GWKBZOAS · pith_short_8: P7DQGAO2

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/P7DQGAO2GWKBZOAS6FR6RHMMGD \
  | 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: 7fc70301da35941cb812f163e89d8c30e4c9e230beab22fe3a6b44d00bee2c8c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4d18d0a898311110671429ca20f6a881e805cc4e1af1b355e11270ec3726eae3",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2005-12-22T13:04:48Z",
    "title_canon_sha256": "723a0f4f2baa5ac3ce389357e1d10af0a39721895b86b5b7b57c61ffe6e58a02"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0512197",
    "kind": "arxiv",
    "version": 1
  }
}