Pith Number

pith:PAWJHFIV

pith:2019:PAWJHFIVFENPBNL4X4A5SEBVGB

not attested not anchored not stored refs pending

Oprema -- The Relay Computer of Carl Zeiss Jena

Juergen F. H. Winkler

arxiv:1908.09549 v1 · 2019-08-26 · cs.GL

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PAWJHFIVFENPBNL4X4A5SEBVGB}

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	2026-07-04T23:59:41.454704Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

782c939515291af0b57cbf01d910353048ea3296fad04f1ae9f2b5538905100f

Aliases

arxiv: 1908.09549 · arxiv_version: 1908.09549v1 · doi: 10.48550/arxiv.1908.09549 · pith_short_12: PAWJHFIVFENP · pith_short_16: PAWJHFIVFENPBNL4 · pith_short_8: PAWJHFIV

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/PAWJHFIVFENPBNL4X4A5SEBVGB \
  | 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: 782c939515291af0b57cbf01d910353048ea3296fad04f1ae9f2b5538905100f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c7a089e22e7c7e8d4c2fed0078f6532986cf2d28cd88282792ac6144edfd8b4b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.GL",
    "submitted_at": "2019-08-26T09:19:55Z",
    "title_canon_sha256": "baed97f78e64110d5c92fc4d6741f4f9d52156f1ea31baaa26feaad3c33abf4f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.09549",
    "kind": "arxiv",
    "version": 1
  }
}