Pith Number

pith:VN7BYGZT

pith:2011:VN7BYGZTXUVUTR6Y27MKRI3W3L

not attested not anchored not stored refs pending

Algebraic Geometry tools for the study of entanglement: an application to spin squeezed states

Alessandra Bernardi, Iacopo Carusotto

arxiv:1109.0221 v1 · 2011-09-01 · quant-ph · math.AC · math.AG

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VN7BYGZTXUVUTR6Y27MKRI3W3L}

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	2026-05-18T03:49:11.915302Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ab7e1c1b33bd2b49c7d8d7d8a8a376dac7c62794ecf6330d53de2dfb9f828732

Aliases

arxiv: 1109.0221 · arxiv_version: 1109.0221v1 · doi: 10.48550/arxiv.1109.0221 · pith_short_12: VN7BYGZTXUVU · pith_short_16: VN7BYGZTXUVUTR6Y · pith_short_8: VN7BYGZT

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/VN7BYGZTXUVUTR6Y27MKRI3W3L \
  | 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: ab7e1c1b33bd2b49c7d8d7d8a8a376dac7c62794ecf6330d53de2dfb9f828732

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8da548beba1f1d044336cddea4d9bea494305bcb28eec99e8c99817049b8d399",
    "cross_cats_sorted": [
      "math.AC",
      "math.AG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2011-09-01T15:52:14Z",
    "title_canon_sha256": "78320f30efbf2709d39d97f93347feeba92e5afa2aa54922298442f271839b36"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.0221",
    "kind": "arxiv",
    "version": 1
  }
}