Pith Number

pith:4CKF42L5

pith:2020:4CKF42L5AMS73HIPW47OTOXQLE

not attested not anchored not stored refs pending

Fast tests for probing the causal structure of quantum processes

Giulio Chiribella, Swati

arxiv:2004.08308 v3 · 2020-04-17 · quant-ph · math-ph · math.MP

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4CKF42L5AMS73HIPW47OTOXQLE}

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	2026-07-05T05:00:12.403256Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e0945e697d0325fd9d0fb73ee9baf05927b78fe8063e161fa61da63c7240a1e7

Aliases

arxiv: 2004.08308 · arxiv_version: 2004.08308v3 · doi: 10.48550/arxiv.2004.08308 · pith_short_12: 4CKF42L5AMS7 · pith_short_16: 4CKF42L5AMS73HIP · pith_short_8: 4CKF42L5

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/4CKF42L5AMS73HIPW47OTOXQLE \
  | 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: e0945e697d0325fd9d0fb73ee9baf05927b78fe8063e161fa61da63c7240a1e7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7b168c5bd944e397fbcb0f5e88755b603f1235116e50335b1fc3c18baad166d7",
    "cross_cats_sorted": [
      "math-ph",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2020-04-17T15:39:27Z",
    "title_canon_sha256": "5478ba75228a18446e2ea77a8c002e03c157361eed632f921938eb0aeb9886a3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2004.08308",
    "kind": "arxiv",
    "version": 3
  }
}