Pith Number

pith:WYOPBPUW

pith:2009:WYOPBPUWP3JJ6NJLTMSFP7ZCI4

not attested not anchored not stored refs pending

Entanglement combing

Dong Yang, Jens Eisert

arxiv:0907.4757 v2 · 2009-07-27 · 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{WYOPBPUWP3JJ6NJLTMSFP7ZCI4}

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	2026-05-18T02:12:47.375191Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b61cf0be967ed29f352b9b2457ff22473f4d08c0b567f0b6bd1eeef56ad35535

Aliases

arxiv: 0907.4757 · arxiv_version: 0907.4757v2 · doi: 10.48550/arxiv.0907.4757 · pith_short_12: WYOPBPUWP3JJ · pith_short_16: WYOPBPUWP3JJ6NJL · pith_short_8: WYOPBPUW

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/WYOPBPUWP3JJ6NJLTMSFP7ZCI4 \
  | 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: b61cf0be967ed29f352b9b2457ff22473f4d08c0b567f0b6bd1eeef56ad35535

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "992740629d040690c2c1afa962c4c57c8820214c70e6aea28d1d4a65286c7339",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-07-27T20:04:28Z",
    "title_canon_sha256": "1961be5eba6a6ff558797736dd9014ab1516e94f8785be21357b912878197939"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0907.4757",
    "kind": "arxiv",
    "version": 2
  }
}