Pith Number

pith:AV2NISVQ

pith:2019:AV2NISVQBLI2ZQGT6S6FBUQC2B

not attested not anchored not stored refs pending

A persistent homology approach to heart rate variability analysis with an application to sleep-wake classification

Chuan-Shen Hu, Hau-Tieng Wu, Yu-Lun Lo, Yu-Min Chung

arxiv:1908.06856 v2 · 2019-08-09 · eess.SP · cs.LG · physics.data-an

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{AV2NISVQBLI2ZQGT6S6FBUQC2B}

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	2026-07-05T00:59:42.507882Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0574d44ab00ad1acc0d3f4bc50d202d04bc7a5de0c8f7723eab29576fa27aa70

Aliases

arxiv: 1908.06856 · arxiv_version: 1908.06856v2 · doi: 10.48550/arxiv.1908.06856 · pith_short_12: AV2NISVQBLI2 · pith_short_16: AV2NISVQBLI2ZQGT · pith_short_8: AV2NISVQ

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/AV2NISVQBLI2ZQGT6S6FBUQC2B \
  | 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: 0574d44ab00ad1acc0d3f4bc50d202d04bc7a5de0c8f7723eab29576fa27aa70

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e54d5f6c32c43a109e3564665921328d9d18e6327d25753b9435fb9aa17b0789",
    "cross_cats_sorted": [
      "cs.LG",
      "physics.data-an"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "eess.SP",
    "submitted_at": "2019-08-09T05:02:03Z",
    "title_canon_sha256": "f050fe8422e2db2bf5330b440d5d9472ad198612d5283ed59ba2f2030e65de22"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.06856",
    "kind": "arxiv",
    "version": 2
  }
}