Pith Number

pith:SADYZGIQ

pith:2004:SADYZGIQAMI3GADX6UALRGTT3H

not attested not anchored not stored refs pending

Estimation of a Noise Level Using Coarse-Grained Entropy of Experimental Time Series of Internal Pressure in a Combustion Engine

Alessandro Giadrossi, Grzegorz Litak, Janusz A. Holyst, Krzysztof Urbanowicz, Miroslaw Wendeker, Rodolfo Taccani

arxiv:nlin/0405052 v1 · 2004-05-22 · nlin.CD

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SADYZGIQAMI3GADX6UALRGTT3H}

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	2026-05-18T01:38:19.023337Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

90078c99100311b30077f500b89a73d9e5a011d69d2686e0a3dea615d4ca2338

Aliases

arxiv: nlin/0405052 · arxiv_version: nlin/0405052v1 · doi: 10.48550/arxiv.nlin/0405052 · pith_short_12: SADYZGIQAMI3 · pith_short_16: SADYZGIQAMI3GADX · pith_short_8: SADYZGIQ

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/SADYZGIQAMI3GADX6UALRGTT3H \
  | 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: 90078c99100311b30077f500b89a73d9e5a011d69d2686e0a3dea615d4ca2338

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dbea7bdc081eb6835d1bd68e9823bc703daf80cbfdd1c7e27f9f546c2f4ad252",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "nlin.CD",
    "submitted_at": "2004-05-22T09:02:28Z",
    "title_canon_sha256": "c590bb32641df9ded3a861d0cef8ba7f9de8c4dcaadac367e78b87f82a50b67e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "nlin/0405052",
    "kind": "arxiv",
    "version": 1
  }
}