Pith Number

pith:B7BGV7T4

pith:2004:B7BGV7T4MWKONO24HEWRTLDH7Y

not attested not anchored not stored refs pending

Backlund transformations for the Nizhnik-Novikov-Veselov equation

V.E. Vekslerchik

arxiv:nlin/0404040 v1 · 2004-04-22 · 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{B7BGV7T4MWKONO24HEWRTLDH7Y}

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	2026-05-18T03:41:13.061953Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0fc26afe7c6594e6bb5c392d19ac67fe176ba45799d22da1f77c0eb9d51ea87b

Aliases

arxiv: nlin/0404040 · arxiv_version: nlin/0404040v1 · doi: 10.48550/arxiv.nlin/0404040 · pith_short_12: B7BGV7T4MWKO · pith_short_16: B7BGV7T4MWKONO24 · pith_short_8: B7BGV7T4

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/B7BGV7T4MWKONO24HEWRTLDH7Y \
  | 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: 0fc26afe7c6594e6bb5c392d19ac67fe176ba45799d22da1f77c0eb9d51ea87b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "db5f6e5f2a67d8c668742e789d9cd79ad93c93f1d9dfc0b31b731aba6610e3e8",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "nlin.SI",
    "submitted_at": "2004-04-22T10:32:21Z",
    "title_canon_sha256": "a180532e23732d73f04475cb5d4e11e85527197e12cc27e7c017eb6d56d99d65"
  },
  "schema_version": "1.0",
  "source": {
    "id": "nlin/0404040",
    "kind": "arxiv",
    "version": 1
  }
}