Pith Number

pith:2UULN7ZZ

pith:2007:2UULN7ZZXCB4QLENZCYWJEKFCN

not attested not anchored not stored refs pending

Halting in quantum Turing computation

G. Jones, J. Heidema, P.H. Potgieter, W.L. Fouch\'e

arxiv:0705.3077 v1 · 2007-05-22 · 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{2UULN7ZZXCB4QLENZCYWJEKFCN}

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	2026-05-18T01:09:24.673230Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d528b6ff39b883c82c8dc8b164914513498007915e6ef2cc5d8a05d34879d9c0

Aliases

arxiv: 0705.3077 · arxiv_version: 0705.3077v1 · doi: 10.48550/arxiv.0705.3077 · pith_short_12: 2UULN7ZZXCB4 · pith_short_16: 2UULN7ZZXCB4QLEN · pith_short_8: 2UULN7ZZ

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/2UULN7ZZXCB4QLENZCYWJEKFCN \
  | 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: d528b6ff39b883c82c8dc8b164914513498007915e6ef2cc5d8a05d34879d9c0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "caedce3496afe51df7c70254e787149ef556c2f2d345f0cc418f73d847262d52",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "quant-ph",
    "submitted_at": "2007-05-22T01:12:21Z",
    "title_canon_sha256": "466fbf1de06c1be6b7c5fb0e93a9a60c831e6ddeb49dbdb3f1597a057807984c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0705.3077",
    "kind": "arxiv",
    "version": 1
  }
}