Pith Number

pith:2EFTYYZS

pith:2025:2EFTYYZSA6SNWLZYLEZQZVDCRI

not attested not anchored not stored refs pending

Quantum Classifiers with Trainable Kernel

Li Xu, Ming Li, Shu-Qian Shen, Xiao-Yu Zhang

arxiv:2505.04234 v1 · 2025-05-07 · 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{2EFTYYZSA6SNWLZYLEZQZVDCRI}

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	2026-07-05T10:59:38.557900Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d10b3c633207a4db2f3859330cd4628a2362e2b1201f59fb656f45e52a52e418

Aliases

arxiv: 2505.04234 · arxiv_version: 2505.04234v1 · doi: 10.48550/arxiv.2505.04234 · pith_short_12: 2EFTYYZSA6SN · pith_short_16: 2EFTYYZSA6SNWLZY · pith_short_8: 2EFTYYZS

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/2EFTYYZSA6SNWLZYLEZQZVDCRI \
  | 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: d10b3c633207a4db2f3859330cd4628a2362e2b1201f59fb656f45e52a52e418

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "26bf4cf786e3e96fb5097ee66a79cadf325f648cbc3ff4ca8687719a7fd5d9b5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2025-05-07T08:38:50Z",
    "title_canon_sha256": "7860387a383a044372141c895977edf02e59fa87e3a91bf6e3934267841f114b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.04234",
    "kind": "arxiv",
    "version": 1
  }
}