Pith Number

pith:KKEIJXXC

pith:2000:KKEIJXXC4MPVHSDOBAZYNJIWUK

not attested not anchored not stored refs pending

Characterization of Sleep Stages by Correlations of Heartbeat Increments

Armin Bunde, H. Eugene Stanley, Jan W. Kantelhardt, Jorg-Hermann Peter, Plamen Ch. Ivanov, Shlomo Havlin, Thomas Penzel, Yosef Ashkenazy

arxiv:cond-mat/0012390 v2 · 2000-12-20 · cond-mat.stat-mech · physics.bio-ph · physics.data-an · q-bio

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KKEIJXXC4MPVHSDOBAZYNJIWUK}

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	2026-07-04T16:19:33.384608Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

528884dee2e31f53c86e083386a516a2b6a91f69ee81a7f733030986ba6672c8

Aliases

arxiv: cond-mat/0012390 · arxiv_version: cond-mat/0012390v2 · doi: 10.48550/arxiv.cond-mat/0012390 · pith_short_12: KKEIJXXC4MPV · pith_short_16: KKEIJXXC4MPVHSDO · pith_short_8: KKEIJXXC

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/KKEIJXXC4MPVHSDOBAZYNJIWUK \
  | 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: 528884dee2e31f53c86e083386a516a2b6a91f69ee81a7f733030986ba6672c8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "839a82873d3e5e82686876deb81e375d0591d7165cead692ca697cc0657de3a4",
    "cross_cats_sorted": [
      "physics.bio-ph",
      "physics.data-an",
      "q-bio"
    ],
    "license": "",
    "primary_cat": "cond-mat.stat-mech",
    "submitted_at": "2000-12-20T20:25:19Z",
    "title_canon_sha256": "79183f61b6dfed642a728497c769558c317da23b715b6cd372669d3338bafe04"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cond-mat/0012390",
    "kind": "arxiv",
    "version": 2
  }
}