Pith Number

pith:KX2CL5HE

pith:2012:KX2CL5HE2VX6JX37GVDJSSJJ5S

not attested not anchored not stored refs pending

A no-go result on the purification of quantum states

C. Di Franco, M. Paternostro

arxiv:1212.4927 v2 · 2012-12-20 · quant-ph · math-ph · math.MP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KX2CL5HE2VX6JX37GVDJSSJJ5S}

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	2026-05-18T03:21:54.758500Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

55f425f4e4d56fe4df7f3546994929ecb1af02dd72654b1d31c1e156d906406d

Aliases

arxiv: 1212.4927 · arxiv_version: 1212.4927v2 · doi: 10.48550/arxiv.1212.4927 · pith_short_12: KX2CL5HE2VX6 · pith_short_16: KX2CL5HE2VX6JX37 · pith_short_8: KX2CL5HE

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/KX2CL5HE2VX6JX37GVDJSSJJ5S \
  | 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: 55f425f4e4d56fe4df7f3546994929ecb1af02dd72654b1d31c1e156d906406d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "81de3550ff05dd128713f2b9bb17a65ee65b860403f73121045a9a125cc33721",
    "cross_cats_sorted": [
      "math-ph",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2012-12-20T05:46:16Z",
    "title_canon_sha256": "ae2535acc92f2707b285c0f5260211928e0d463702fc46c8a73263797f01d3c1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.4927",
    "kind": "arxiv",
    "version": 2
  }
}