Pith Number

pith:LT76LC4H

pith:2021:LT76LC4HICUKVBDZN4REJPL64Z

not attested not anchored not stored refs pending

Self-supervised Contrastive Learning for EEG-based Sleep Staging

Bo Du, Jianhui Zhao, Xue Jiang, Zhiyong Yuan

arxiv:2109.07839 v1 · 2021-09-16 · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LT76LC4HICUKVBDZN4REJPL64Z}

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	2026-07-05T03:15:01.704554Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5cffe58b8740a8aa84796f2244bd7ee67292816678ca79ef6ca08e463d8037ff

Aliases

arxiv: 2109.07839 · arxiv_version: 2109.07839v1 · doi: 10.48550/arxiv.2109.07839 · pith_short_12: LT76LC4HICUK · pith_short_16: LT76LC4HICUKVBDZ · pith_short_8: LT76LC4H

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/LT76LC4HICUKVBDZN4REJPL64Z \
  | 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: 5cffe58b8740a8aa84796f2244bd7ee67292816678ca79ef6ca08e463d8037ff

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "720f6e2abc8d5685eb8f32af73e9e93f251649794baae2b71b1c5d9059e07880",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2021-09-16T10:05:33Z",
    "title_canon_sha256": "69fef742729b4d8ec7e8ffd15059e4d76fcf69b9fd0151cdf561a00b2cfc36e9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.07839",
    "kind": "arxiv",
    "version": 1
  }
}