Pith Number

pith:QDEOV5K5

pith:2018:QDEOV5K5RMR4KL5JBQOUXOQF63

not attested not anchored not stored refs pending

Quassical Computing

Cristian S. Calude, Edward H. "Ned" Allen

arxiv:1805.03306 v2 · 2018-05-08 · 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{QDEOV5K5RMR4KL5JBQOUXOQF63}

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	2026-05-18T00:08:14.848727Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80c8eaf55d8b23c52fa90c1d4bba05f6d70263dc03bc95279e12270036da8ef6

Aliases

arxiv: 1805.03306 · arxiv_version: 1805.03306v2 · doi: 10.48550/arxiv.1805.03306 · pith_short_12: QDEOV5K5RMR4 · pith_short_16: QDEOV5K5RMR4KL5J · pith_short_8: QDEOV5K5

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/QDEOV5K5RMR4KL5JBQOUXOQF63 \
  | 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: 80c8eaf55d8b23c52fa90c1d4bba05f6d70263dc03bc95279e12270036da8ef6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d044ee141eb0c6bd73623e7d5a63d98b037ef2b0da54e526ef7f18dedfdc0c29",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2018-05-08T22:11:20Z",
    "title_canon_sha256": "541c38020d61a4269c1b2e0c56163f16c858f542ab64ff76bf5bb61e398d0ffb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.03306",
    "kind": "arxiv",
    "version": 2
  }
}