Pith Number

pith:2VZYPLZF

pith:2002:2VZYPLZFZUHMM42PMDR4LCUYLQ

not attested not anchored not stored refs pending

Changes in the Hurst exponent of heartbeat intervals during physical activities

A. Kne\v{z}evi\'c, Croatia), E. Vargovi\'c (Rudjer Bo\v{s}kovi\'c Institute, G. Krsta\v{c}i\'c, M. Martinis, Zagreb

arxiv:physics/0212029 v1 · 2002-12-06 · physics.med-ph · 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{2VZYPLZFZUHMM42PMDR4LCUYLQ}

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	2026-07-04T14:43:51.469982Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d57387af25cd0ec6734f60e3c58a985c397bb8493814b6a5896d1310a4717a54

Aliases

arxiv: physics/0212029 · arxiv_version: physics/0212029v1 · doi: 10.48550/arxiv.physics/0212029 · pith_short_12: 2VZYPLZFZUHM · pith_short_16: 2VZYPLZFZUHMM42P · pith_short_8: 2VZYPLZF

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/2VZYPLZFZUHMM42PMDR4LCUYLQ \
  | 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: d57387af25cd0ec6734f60e3c58a985c397bb8493814b6a5896d1310a4717a54

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9fe991ebccb449d08c02070b71e4739a6c63aa8516514d420c0925dd4c25bf77",
    "cross_cats_sorted": [
      "q-bio"
    ],
    "license": "",
    "primary_cat": "physics.med-ph",
    "submitted_at": "2002-12-06T15:41:17Z",
    "title_canon_sha256": "f2c85dd8fdc8bdc0e971b8343ccaa34380ceac6248757fc8298aa49a50e15023"
  },
  "schema_version": "1.0",
  "source": {
    "id": "physics/0212029",
    "kind": "arxiv",
    "version": 1
  }
}