Pith Number

pith:BHFIKXNN

pith:2018:BHFIKXNN4V5E5GTQ5BJSF4TAFA

not attested not anchored not stored refs pending

The W4 method: a new multi-dimensional root-finding scheme for nonlinear systems of equations

Hiroki Nagakura, Hirotada Okawa, Kotaro Fujisawa, Nobutoshi Yasutake, Ryosuke Hirai, Shoichi Yamada, Yu Yamamoto

arxiv:1809.04495 v1 · 2018-09-12 · cs.NA · astro-ph.IM · gr-qc · math.NA · nlin.CD

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BHFIKXNN4V5E5GTQ5BJSF4TAFA}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T00:05:52.140434Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

09ca855dade57a4e9a70e85322f260282a150fc018a8054f534c36f5e0745bd8

Aliases

arxiv: 1809.04495 · arxiv_version: 1809.04495v1 · doi: 10.48550/arxiv.1809.04495 · pith_short_12: BHFIKXNN4V5E · pith_short_16: BHFIKXNN4V5E5GTQ · pith_short_8: BHFIKXNN

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/BHFIKXNN4V5E5GTQ5BJSF4TAFA \
  | 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: 09ca855dade57a4e9a70e85322f260282a150fc018a8054f534c36f5e0745bd8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2fcb6ba7f1e483046b03306aa669cc4ac3320a74889b676dc3092012c3013d39",
    "cross_cats_sorted": [
      "astro-ph.IM",
      "gr-qc",
      "math.NA",
      "nlin.CD"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NA",
    "submitted_at": "2018-09-12T14:51:30Z",
    "title_canon_sha256": "96fa33f49b7cc0df90353564481c931051cdb3616dda00107d4c1b0e6e32a15d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.04495",
    "kind": "arxiv",
    "version": 1
  }
}