Pith Number

pith:QJP4AFR6

pith:2004:QJP4AFR6ZD52HCLIN4FFZJOTXX

not attested not anchored not stored refs pending

Estimation of the WECC System Inertia Using Observed Frequency Transients

Candee Hassler, Cody Ray, David P. Chassin, Enrique Ramirez, Matthew K. Donnelly, Zhenyu Huang

arxiv:nlin/0409036 v2 · 2004-09-18 · 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{QJP4AFR6ZD52HCLIN4FFZJOTXX}

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	2026-07-04T14:42:00.562614Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

825fc0163ec8fba389686f0a5ca5d3bdf3bdfb365e6866c536d4ebadc1e5752a

Aliases

arxiv: nlin/0409036 · arxiv_version: nlin/0409036v2 · doi: 10.48550/arxiv.nlin/0409036 · pith_short_12: QJP4AFR6ZD52 · pith_short_16: QJP4AFR6ZD52HCLI · pith_short_8: QJP4AFR6

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/QJP4AFR6ZD52HCLIN4FFZJOTXX \
  | 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: 825fc0163ec8fba389686f0a5ca5d3bdf3bdfb365e6866c536d4ebadc1e5752a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "de9d099b0696f0f72061f9d505542ddc2a2beeea659d9a1ebbe891577c15fe22",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "nlin.CD",
    "submitted_at": "2004-09-18T17:03:10Z",
    "title_canon_sha256": "4f412765715f500f085bb55593ea79d791613aac5d6aa69e6b0112985bbd789f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "nlin/0409036",
    "kind": "arxiv",
    "version": 2
  }
}