Pith Number

pith:7SICPIMD

pith:2010:7SICPIMDWRNZJPKGGDJ5QYP75A

not attested not anchored not stored refs pending

Two extensions of 1D Toda hierarchy

Kanehisa Takasaki

arxiv:1002.4688 v2 · 2010-02-25 · nlin.SI · hep-th · math-ph · math.MP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7SICPIMDWRNZJPKGGDJ5QYP75A}

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	2026-05-18T04:09:35.232371Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc9027a183b45b94bd4630d3d861ffe82f430ffcde13a7203b3230a724c08555

Aliases

arxiv: 1002.4688 · arxiv_version: 1002.4688v2 · doi: 10.48550/arxiv.1002.4688 · pith_short_12: 7SICPIMDWRNZ · pith_short_16: 7SICPIMDWRNZJPKG · pith_short_8: 7SICPIMD

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/7SICPIMDWRNZJPKGGDJ5QYP75A \
  | 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: fc9027a183b45b94bd4630d3d861ffe82f430ffcde13a7203b3230a724c08555

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "057717a8057539cf95c5670089efddd407553ac09cc8694c3ed145579c6e88a3",
    "cross_cats_sorted": [
      "hep-th",
      "math-ph",
      "math.MP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "nlin.SI",
    "submitted_at": "2010-02-25T04:17:04Z",
    "title_canon_sha256": "29cc7aa73e668f94edde8f8c4e32ad3dc3a7402116b3ec34024c12d53aad3e44"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1002.4688",
    "kind": "arxiv",
    "version": 2
  }
}