Pith Number

pith:3CWH4BQU

pith:2026:3CWH4BQUJVRUZM5TPYCLGXG5PF

not attested not anchored not stored refs pending

The Reconstructions of Konrad Zuse's Z3 Computer

Raul Rojas

arxiv:2607.13089 v1 · 2026-07-13 · cs.GL · cs.AR · physics.hist-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{3CWH4BQUJVRUZM5TPYCLGXG5PF}

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	2026-07-16T00:21:55.214577Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d8ac7e06144d634cb3b37e04b35cdd796ab7ae89ea80eb941b4244d1886b93e2

Aliases

arxiv: 2607.13089 · arxiv_version: 2607.13089v1 · doi: 10.48550/arxiv.2607.13089 · pith_short_12: 3CWH4BQUJVRU · pith_short_16: 3CWH4BQUJVRUZM5T · pith_short_8: 3CWH4BQU

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/3CWH4BQUJVRUZM5TPYCLGXG5PF \
  | 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: d8ac7e06144d634cb3b37e04b35cdd796ab7ae89ea80eb941b4244d1886b93e2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5fca9c854fcb0f6ac6a39c2d165ef3ff4d069669b777b0a2c8053cf9b4f70395",
    "cross_cats_sorted": [
      "cs.AR",
      "physics.hist-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.GL",
    "submitted_at": "2026-07-13T17:10:17Z",
    "title_canon_sha256": "480f3e67cf85d9c0a54353dad56ac10be12fbddff1d355b12b528dc378d92f1c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.13089",
    "kind": "arxiv",
    "version": 1
  }
}