Pith Number

pith:4K4FKITH

pith:2007:4K4FKITH47H5DDHPW5KWEQL6JT

not attested not anchored not stored refs pending

Fractal scale-invariant and nonlinear properties of cardiac dynamics remain stable with advanced age: A new mechanistic picture of cardiac control in healthy elderly

Daniel T. Schmitt, Plamen Ch. Ivanov

arxiv:0712.1380 v1 · 2007-12-10 · physics.data-an · cond-mat.soft · physics.bio-ph · physics.med-ph · q-bio.OT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4K4FKITH47H5DDHPW5KWEQL6JT}

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	2026-05-18T01:05:13.895736Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e2b8552267e7cfd18cefb75562417e4cdc26dda4a48025ff6617b997306abd96

Aliases

arxiv: 0712.1380 · arxiv_version: 0712.1380v1 · doi: 10.48550/arxiv.0712.1380 · pith_short_12: 4K4FKITH47H5 · pith_short_16: 4K4FKITH47H5DDHP · pith_short_8: 4K4FKITH

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/4K4FKITH47H5DDHPW5KWEQL6JT \
  | 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: e2b8552267e7cfd18cefb75562417e4cdc26dda4a48025ff6617b997306abd96

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e0377f3fdd392c1a985100ef9342da848ac4fd547e8ea5ff40c1ba044fcce3f0",
    "cross_cats_sorted": [
      "cond-mat.soft",
      "physics.bio-ph",
      "physics.med-ph",
      "q-bio.OT"
    ],
    "license": "",
    "primary_cat": "physics.data-an",
    "submitted_at": "2007-12-10T00:42:44Z",
    "title_canon_sha256": "3571b90e204c0446da90aabf388eaf0f763ae97301037a68e5b21a83a4819ed1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0712.1380",
    "kind": "arxiv",
    "version": 1
  }
}