Pith Number

pith:YMBH2RHU

pith:2020:YMBH2RHU7FUHK6SKB7F2APV3QF

not attested not anchored not stored refs pending

Cyclic Quantum Causal Models

Jonathan Barrett, Ognyan Oreshkov, Robin Lorenz

arxiv:2002.12157 v3 · 2020-02-27 · 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{YMBH2RHU7FUHK6SKB7F2APV3QF}

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.

Cited by

1 paper in Pith

Impossibility of superluminal signalling rules out causal loops in conical spacetimes

Receipt and verification

First computed	2026-07-05T02:20:13.186803Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c3027d44f4f968757a4a0fcba03ebb8145ae41efb84355c0c12cf821bd044034

Aliases

arxiv: 2002.12157 · arxiv_version: 2002.12157v3 · doi: 10.48550/arxiv.2002.12157 · pith_short_12: YMBH2RHU7FUH · pith_short_16: YMBH2RHU7FUHK6SK · pith_short_8: YMBH2RHU

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/YMBH2RHU7FUHK6SKB7F2APV3QF \
  | 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: c3027d44f4f968757a4a0fcba03ebb8145ae41efb84355c0c12cf821bd044034

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ed366ccc88651ef78481cd61d9a377df1e4b80b0cc795d77b47db6b30fd1820e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2020-02-27T15:07:22Z",
    "title_canon_sha256": "6718e14945ad7a3558b8ee30f3ab871e068d3638be1cb897c05f6c6c42604fea"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2002.12157",
    "kind": "arxiv",
    "version": 3
  }
}