Pith Number

pith:FOKPT6TD

pith:2012:FOKPT6TD4AOH3L77ZJM6SUBU6I

not attested not anchored not stored refs pending

Method for classifying multiqubit states via the rank of the coefficient matrix and its application to four-qubit states

Dafa Li, Xiangrong Li

arxiv:1201.2229 v2 · 2012-01-11 · 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{FOKPT6TD4AOH3L77ZJM6SUBU6I}

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	2026-05-18T03:42:11.673278Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2b94f9fa63e01c7dafffca59e95034f2361298506a3542b6fecf6161b2691603

Aliases

arxiv: 1201.2229 · arxiv_version: 1201.2229v2 · doi: 10.48550/arxiv.1201.2229 · pith_short_12: FOKPT6TD4AOH · pith_short_16: FOKPT6TD4AOH3L77 · pith_short_8: FOKPT6TD

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/FOKPT6TD4AOH3L77ZJM6SUBU6I \
  | 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: 2b94f9fa63e01c7dafffca59e95034f2361298506a3542b6fecf6161b2691603

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4d7dbbc0f345bf6f9a549db65986c1f59104358bd92d440e091655c76b2c993f",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/3.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2012-01-11T03:07:20Z",
    "title_canon_sha256": "bd631e1d69fa8af544a391479183d7dbb818ffed3a551feff6a65a407b534a74"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.2229",
    "kind": "arxiv",
    "version": 2
  }
}