Pith Number

pith:QFILNQK7

pith:2009:QFILNQK7VWVDMJCWXFOM3WUHQ3

not attested not anchored not stored refs pending

On Quantum-Classical Equivalence for Composed Communication Problems

Alexander A. Sherstov

arxiv:0906.1399 v3 · 2009-06-08 · cs.CC · 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{QFILNQK7VWVDMJCWXFOM3WUHQ3}

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	2026-07-04T17:20:44.715193Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8150b6c15fadaa362456b95ccdda8786f8b1dbff3a6d6bf7eb353fcc7b9ee480

Aliases

arxiv: 0906.1399 · arxiv_version: 0906.1399v3 · doi: 10.48550/arxiv.0906.1399 · pith_short_12: QFILNQK7VWVD · pith_short_16: QFILNQK7VWVDMJCW · pith_short_8: QFILNQK7

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/QFILNQK7VWVDMJCWXFOM3WUHQ3 \
  | 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: 8150b6c15fadaa362456b95ccdda8786f8b1dbff3a6d6bf7eb353fcc7b9ee480

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d9076f666d739f8b3db694acfaa451f17ef685b4012e06da68e0a602492779e5",
    "cross_cats_sorted": [
      "quant-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2009-06-08T01:00:23Z",
    "title_canon_sha256": "3e0abc2c829f4434a97c22ae9912128400fbfbd8467bdd7d32cacd5cc296bfb3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.1399",
    "kind": "arxiv",
    "version": 3
  }
}