Pith Number

pith:Z34AWQHX

pith:2008:Z34AWQHXFRW3B6XBYGYWWGFNF6

not attested not anchored not stored refs pending

Nonadditivity effects in classical capacities of quantum multiple-access channels

Lukasz Czekaj, Pawel Horodecki

arxiv:0807.3977 v1 · 2008-07-24 · 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{Z34AWQHXFRW3B6XBYGYWWGFNF6}

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	2026-05-18T03:24:18.339304Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cef80b40f72c6db0fae1c1b16b18ad2fb94f148ebf8270cbd1be7ded830b127f

Aliases

arxiv: 0807.3977 · arxiv_version: 0807.3977v1 · doi: 10.48550/arxiv.0807.3977 · pith_short_12: Z34AWQHXFRW3 · pith_short_16: Z34AWQHXFRW3B6XB · pith_short_8: Z34AWQHX

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/Z34AWQHXFRW3B6XBYGYWWGFNF6 \
  | 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: cef80b40f72c6db0fae1c1b16b18ad2fb94f148ebf8270cbd1be7ded830b127f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4d48fa50c38e638c98ca4ebe0693fa0d48ad723c426f1e8ee1de464b719aa258",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2008-07-24T21:49:05Z",
    "title_canon_sha256": "d6dbd10a2468b18df661a3bd9f7948e3e912f18a7c704411f63821c7b43c7e3f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0807.3977",
    "kind": "arxiv",
    "version": 1
  }
}