Pith Number

pith:RRTVUFX7

pith:2009:RRTVUFX7QE26GELZWK562M4DSC

not attested not anchored not stored refs pending

$\eta$-trigonometric states of four qubits and entanglement measures

Andrzej M. Frydryszak

arxiv:0902.3553 v1 · 2009-02-20 · 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{RRTVUFX7QE26GELZWK562M4DSC}

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	2026-07-04T15:38:26.574735Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8c675a16ff8135e31179b2bbed33839097eb9fd0e05ccbaed7dc36321d53e655

Aliases

arxiv: 0902.3553 · arxiv_version: 0902.3553v1 · doi: 10.48550/arxiv.0902.3553 · pith_short_12: RRTVUFX7QE26 · pith_short_16: RRTVUFX7QE26GELZ · pith_short_8: RRTVUFX7

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/RRTVUFX7QE26GELZWK562M4DSC \
  | 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: 8c675a16ff8135e31179b2bbed33839097eb9fd0e05ccbaed7dc36321d53e655

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "32dcc122128498659b3fdb5cd70626b88e97959e73b87efc95a2f379844a163d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-02-20T10:59:44Z",
    "title_canon_sha256": "bcdebe38b4fc18e01520eb4ae29d3f2ea720bcfb9b4519fd77be32a3e202b031"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.3553",
    "kind": "arxiv",
    "version": 1
  }
}