Pith Number

pith:WRDYY4ZV

pith:2002:WRDYY4ZVZWGIBQBWYNSEODWBSY

not attested not anchored not stored refs pending

New Darboux Transformation for Hirota-Satsuma coupled KdV System

Heng Chun Hu, Q. P. Liu

arxiv:nlin/0204018 v1 · 2002-04-11 · nlin.SI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WRDYY4ZVZWGIBQBWYNSEODWBSY}

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	2026-05-18T01:38:21.472976Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b4478c7335cd8c80c036c364470ec1963a9ebc267e214717ad2e8050bad01242

Aliases

arxiv: nlin/0204018 · arxiv_version: nlin/0204018v1 · doi: 10.48550/arxiv.nlin/0204018 · pith_short_12: WRDYY4ZVZWGI · pith_short_16: WRDYY4ZVZWGIBQBW · pith_short_8: WRDYY4ZV

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/WRDYY4ZVZWGIBQBWYNSEODWBSY \
  | 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: b4478c7335cd8c80c036c364470ec1963a9ebc267e214717ad2e8050bad01242

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f3b965636a08947b727fc3dabac9ec8a64c5e5ab89c8e268d27de19cbec18804",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "nlin.SI",
    "submitted_at": "2002-04-11T09:40:02Z",
    "title_canon_sha256": "8251e0d6f29d928a6f362943e67cc73b655838c00fc0c8ed451b31b9312e1032"
  },
  "schema_version": "1.0",
  "source": {
    "id": "nlin/0204018",
    "kind": "arxiv",
    "version": 1
  }
}