Pith Number

pith:5DB2YYKL

pith:2012:5DB2YYKLEHK33MZK3PEN7QXYJA

not attested not anchored not stored refs pending

The classical capacity of quantum thermal noise channels to within 1.45 bits

Graeme Smith, Robert Koenig

arxiv:1207.0256 v1 · 2012-07-02 · 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{5DB2YYKLEHK33MZK3PEN7QXYJA}

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	2026-05-18T03:34:38.122013Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e8c3ac614b21d5bdb32adbc8dfc2f8482f08a3a1537564581457d8c156bb9f2f

Aliases

arxiv: 1207.0256 · arxiv_version: 1207.0256v1 · doi: 10.48550/arxiv.1207.0256 · pith_short_12: 5DB2YYKLEHK3 · pith_short_16: 5DB2YYKLEHK33MZK · pith_short_8: 5DB2YYKL

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/5DB2YYKLEHK33MZK3PEN7QXYJA \
  | 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: e8c3ac614b21d5bdb32adbc8dfc2f8482f08a3a1537564581457d8c156bb9f2f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "44c896f911e4b4cfd10fd426018c00732353ea714a16ead7c04ebc99357d88e8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2012-07-02T00:08:53Z",
    "title_canon_sha256": "4621b5bbf2ee6e3637a16959b8efc63a23bc572faaca7ee6d60a5360903b92d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.0256",
    "kind": "arxiv",
    "version": 1
  }
}