Pith Number

pith:WKFHWPLT

pith:2019:WKFHWPLTTIY7FOASYHK62ST6JS

not attested not anchored not stored refs pending

A strongly coupled extended Toda hierarchy and its Virasoro symmetry

Chuanzhong Li

arxiv:1907.04689 v1 · 2019-07-09 · 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{WKFHWPLTTIY7FOASYHK62ST6JS}

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	2026-05-17T23:39:53.327392Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b28a7b3d739a31f2b812c1d5ed4a7e4c9c6297e51630273d50e12c5a3d1d8ebd

Aliases

arxiv: 1907.04689 · arxiv_version: 1907.04689v1 · doi: 10.48550/arxiv.1907.04689 · pith_short_12: WKFHWPLTTIY7 · pith_short_16: WKFHWPLTTIY7FOAS · pith_short_8: WKFHWPLT

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/WKFHWPLTTIY7FOASYHK62ST6JS \
  | 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: b28a7b3d739a31f2b812c1d5ed4a7e4c9c6297e51630273d50e12c5a3d1d8ebd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f92397847964627323fb5eeee34d230c56d9500e622f7d85417971fa3ca3d69e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "nlin.SI",
    "submitted_at": "2019-07-09T13:45:52Z",
    "title_canon_sha256": "4d5b0b1d22e2e2f74524a59e64e58306892e4cae8dd48a321b7a9f6e0d6c5e7c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.04689",
    "kind": "arxiv",
    "version": 1
  }
}