Pith Number

pith:EFAY37UN

pith:2025:EFAY37UNEVCSZHDDZ4TIIZASBG

not attested not anchored not stored refs pending

Orthocomplemented subspaces and partial projections on a Hilbert space

Iosif Petrakis

arxiv:2508.15906 v1 · 2025-08-21 · 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{EFAY37UNEVCSZHDDZ4TIIZASBG}

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	2026-07-05T11:57:22.812470Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

21418dfe8d25452c9c63cf2684641209a3970d5fe6af8b5a00203c0a06acff33

Aliases

arxiv: 2508.15906 · arxiv_version: 2508.15906v1 · doi: 10.48550/arxiv.2508.15906 · pith_short_12: EFAY37UNEVCS · pith_short_16: EFAY37UNEVCSZHDD · pith_short_8: EFAY37UN

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/EFAY37UNEVCSZHDDZ4TIIZASBG \
  | 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: 21418dfe8d25452c9c63cf2684641209a3970d5fe6af8b5a00203c0a06acff33

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5e7882d8eebb49c747e00810bb7200120914da8a3b1a24cddaa67da702b1eb9f",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2025-08-21T18:07:29Z",
    "title_canon_sha256": "1f08984d94acbfd0d1f673ebc75e804af926c2d64577b7ddb9cbd457ce77757b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2508.15906",
    "kind": "arxiv",
    "version": 1
  }
}