Pith Number

pith:H5L2JNSW

pith:2025:H5L2JNSWBDIKF4P4GL3PG3LOL4

not attested not anchored not stored refs pending

Encodings of Observable Subalgebras

Harriet Apel, Maite Arcos, Toby Cubitt

arxiv:2502.20591 v1 · 2025-02-27 · 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{H5L2JNSWBDIKF4P4GL3PG3LOL4}

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	2026-07-05T10:21:35.703268Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3f57a4b65608d0a2f1fc32f6f36d6e5f12bcb2d1fae840e0a68b41c5a22d441f

Aliases

arxiv: 2502.20591 · arxiv_version: 2502.20591v1 · doi: 10.48550/arxiv.2502.20591 · pith_short_12: H5L2JNSWBDIK · pith_short_16: H5L2JNSWBDIKF4P4 · pith_short_8: H5L2JNSW

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/H5L2JNSWBDIKF4P4GL3PG3LOL4 \
  | 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: 3f57a4b65608d0a2f1fc32f6f36d6e5f12bcb2d1fae840e0a68b41c5a22d441f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "724fff28b83abf4dd9b8e4c21b0e3343be1f8b4019f79917df108473c0c41905",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2025-02-27T23:32:31Z",
    "title_canon_sha256": "004274af88bb68b8ae293dd5624a7c8a80ca84c4bb57a85aa79bb17880dc8514"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2502.20591",
    "kind": "arxiv",
    "version": 1
  }
}