Pith Number

pith:RQ5OUXI3

pith:2026:RQ5OUXI3OHWOGSB4YGINPZBSG5

not attested not anchored not stored refs pending

Efficient time-series prediction on NISQ devices via time-delayed quantum extreme learning machine

Hiroshi Imai, Jun-ichi Shirakashi, Kathy Ludge, Mio Kawanabe, Saud Cindrak, Tetsuo Shibuya

arxiv:2602.21544 v2 · 2026-02-25 · 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{RQ5OUXI3OHWOGSB4YGINPZBSG5}

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	2026-06-19T16:09:55.380818Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8c3aea5d1b71ece3483cc190d7e4323763df5219350c0b2b1879e230db974bce

Aliases

arxiv: 2602.21544 · arxiv_version: 2602.21544v2 · doi: 10.48550/arxiv.2602.21544 · pith_short_12: RQ5OUXI3OHWO · pith_short_16: RQ5OUXI3OHWOGSB4 · pith_short_8: RQ5OUXI3

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/RQ5OUXI3OHWOGSB4YGINPZBSG5 \
  | 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: 8c3aea5d1b71ece3483cc190d7e4323763df5219350c0b2b1879e230db974bce

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d252eacac6a865c4e3696e17ae412f3d20b7a5ae42a893434cc1c1862161dd42",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2026-02-25T04:03:41Z",
    "title_canon_sha256": "8136e6213b05a4a331d8be19c534c4879836782d494f63e99720ad4492fb10e8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2602.21544",
    "kind": "arxiv",
    "version": 2
  }
}