Pith Number

pith:6DVFGWWX

pith:2015:6DVFGWWXW7D73DU3RLAOUOIZ5I

not attested not anchored not stored refs pending

An exact relation between number of black box computations required to solve an oracle problem quantumly and quantum retrocausality

Giuseppe Castagnoli

arxiv:1508.00454 v2 · 2015-08-03 · 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{6DVFGWWXW7D73DU3RLAOUOIZ5I}

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	2026-05-18T01:29:29.288973Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f0ea535ad7b7c7fd8e9b8ac0ea3919ea20f625a52b89fbf5cd1a891a860a80e1

Aliases

arxiv: 1508.00454 · arxiv_version: 1508.00454v2 · doi: 10.48550/arxiv.1508.00454 · pith_short_12: 6DVFGWWXW7D7 · pith_short_16: 6DVFGWWXW7D73DU3 · pith_short_8: 6DVFGWWX

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/6DVFGWWXW7D73DU3RLAOUOIZ5I \
  | 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: f0ea535ad7b7c7fd8e9b8ac0ea3919ea20f625a52b89fbf5cd1a891a860a80e1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4595a0f73a20d3b93288ee76c478f0fd2041af6bc7d89af9c22347762dd9611b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2015-08-03T15:31:20Z",
    "title_canon_sha256": "55ae1c7c51d32c155bf62651fba4975c653b5cf002c203efae4a3ddabcc44d62"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.00454",
    "kind": "arxiv",
    "version": 2
  }
}