Pith Number

pith:D7LRVQN2

pith:2000:D7LRVQN27TFYF67WVX3SGP65WT

not attested not anchored not stored refs pending

Degenerate Poisson pencils on curves: new separability theory

Maciej Blaszak

arxiv:nlin/0004002 v2 · 2000-04-01 · 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{D7LRVQN27TFYF67WVX3SGP65WT}

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	2026-05-18T01:38:22.107830Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1fd71ac1bafccb82fbf6adf7233fddb4ea7b3046ac40ef23fc62b1b1c3ec78c6

Aliases

arxiv: nlin/0004002 · arxiv_version: nlin/0004002v2 · doi: 10.48550/arxiv.nlin/0004002 · pith_short_12: D7LRVQN27TFY · pith_short_16: D7LRVQN27TFYF67W · pith_short_8: D7LRVQN2

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/D7LRVQN27TFYF67WVX3SGP65WT \
  | 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: 1fd71ac1bafccb82fbf6adf7233fddb4ea7b3046ac40ef23fc62b1b1c3ec78c6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7ca56cfd5565d7313375b43f291d1c21cd3316580ef7a0d7a696a2faa56af033",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "nlin.SI",
    "submitted_at": "2000-04-01T12:10:14Z",
    "title_canon_sha256": "600d1b9c9e85e0c846348278f153e63a1f71a38406c25f998ea400f5bd06dd2f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "nlin/0004002",
    "kind": "arxiv",
    "version": 2
  }
}