Pith Number

pith:UB6W5AD7

pith:2002:UB6W5AD7HJ5MKI4LYN6PGO5X4O

not attested not anchored not stored refs pending

Counterexample to an additivity conjecture for output purity of quantum channels

A.S. Holevo, R.F. Werner

arxiv:quant-ph/0203003 v1 · 2002-03-01 · 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{UB6W5AD7HJ5MKI4LYN6PGO5X4O}

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	2026-05-18T01:38:02.086021Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a07d6e807f3a7ac5238bc37cf33bb7e38b566fadb7035767e1c7b5436510dff8

Aliases

arxiv: quant-ph/0203003 · arxiv_version: quant-ph/0203003v1 · doi: 10.48550/arxiv.quant-ph/0203003 · pith_short_12: UB6W5AD7HJ5M · pith_short_16: UB6W5AD7HJ5MKI4L · pith_short_8: UB6W5AD7

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/UB6W5AD7HJ5MKI4LYN6PGO5X4O \
  | 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: a07d6e807f3a7ac5238bc37cf33bb7e38b566fadb7035767e1c7b5436510dff8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fcfacd5c30b0d630bff7c2f2010f8a0706bbf45bc93ee93e366118f397e0ebb5",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2002-03-01T14:52:41Z",
    "title_canon_sha256": "9954f0ceb425ac24d7b190b87dfb51b40cd22347f4ef740a88c8555f8584a659"
  },
  "schema_version": "1.0",
  "source": {
    "id": "quant-ph/0203003",
    "kind": "arxiv",
    "version": 1
  }
}