Pith Number

pith:7WWYYU4I

pith:2022:7WWYYU4IERPUYEHGTKLZFF4FHJ

not attested not anchored not stored refs pending

Von Neumann's information engine without the spectral theorem

Francesco Buscemi, Hayato Arai, Shintaro Minagawa

arxiv:2203.05258 v2 · 2022-03-10 · 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{7WWYYU4IERPUYEHGTKLZFF4FHJ}

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	2026-07-05T04:45:17.335224Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fdad8c5388245f4c10e69a979297853a72a4bc9546b7846afad75758b117ccb0

Aliases

arxiv: 2203.05258 · arxiv_version: 2203.05258v2 · doi: 10.48550/arxiv.2203.05258 · pith_short_12: 7WWYYU4IERPU · pith_short_16: 7WWYYU4IERPUYEHG · pith_short_8: 7WWYYU4I

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/7WWYYU4IERPUYEHGTKLZFF4FHJ \
  | 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: fdad8c5388245f4c10e69a979297853a72a4bc9546b7846afad75758b117ccb0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a5f8829209ca6fe6ac3bc9500515c1c3bd67cf683abb1438421e1ce34be6e6c7",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2022-03-10T09:40:05Z",
    "title_canon_sha256": "c800e526c418ceb77d54eebdf04a5a75106f95938b485abe093aef7ef2321473"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2203.05258",
    "kind": "arxiv",
    "version": 2
  }
}