Pith Number

pith:OBGQKFKV

pith:2012:OBGQKFKVTFQC25WSCBFMAW2JON

not attested not anchored not stored refs pending

A criterion for coincidence of the entanglement-assisted classical capacity and the Holevo capacity of a quantum channel

M.E. Shirokov

arxiv:1202.3449 v2 · 2012-02-15 · 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{OBGQKFKVTFQC25WSCBFMAW2JON}

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	2026-05-18T03:50:25.431703Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

704d05155599602d76d2104ac05b49736aafb23820abaf9d395134c49d4881f3

Aliases

arxiv: 1202.3449 · arxiv_version: 1202.3449v2 · doi: 10.48550/arxiv.1202.3449 · pith_short_12: OBGQKFKVTFQC · pith_short_16: OBGQKFKVTFQC25WS · pith_short_8: OBGQKFKV

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/OBGQKFKVTFQC25WSCBFMAW2JON \
  | 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: 704d05155599602d76d2104ac05b49736aafb23820abaf9d395134c49d4881f3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b9f17491d29f8e92abcc54f6e306fb10878b6fb89ab00d283c002b58c8b84899",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2012-02-15T21:22:12Z",
    "title_canon_sha256": "ed403b4debeaf853bf99bfdda09079ad3f5aa7ac3407ec50432be0a847f4dad4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.3449",
    "kind": "arxiv",
    "version": 2
  }
}