Pith Number

pith:GJQ5EJAT

pith:2019:GJQ5EJAT3KFHH2NH4FPZ4DBXWT

not attested not anchored not stored refs pending

Solvable Systems Featuring 2 Dependent Variables Evolving in Discrete-Time via 2 Nonlinearly-Coupled First-Order Recursion Relations with Polynomial Right-Hand Sides

Farrin Payandeh, Francesco Calogero

arxiv:1904.02706 v1 · 2019-04-02 · 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{GJQ5EJAT3KFHH2NH4FPZ4DBXWT}

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	2026-05-17T23:49:22.972939Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3261d22413da8a73e9a7e15f9e0c37b4d30c3a60c72dc812ee8910ccc8a07039

Aliases

arxiv: 1904.02706 · arxiv_version: 1904.02706v1 · doi: 10.48550/arxiv.1904.02706 · pith_short_12: GJQ5EJAT3KFH · pith_short_16: GJQ5EJAT3KFHH2NH · pith_short_8: GJQ5EJAT

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/GJQ5EJAT3KFHH2NH4FPZ4DBXWT \
  | 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: 3261d22413da8a73e9a7e15f9e0c37b4d30c3a60c72dc812ee8910ccc8a07039

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ddb5afdaa033a2c7b6920f94b25ccfbe3e06bd2ad6eec6dac791ff8a4d1d8f3f",
    "cross_cats_sorted": [
      "math.MP"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math-ph",
    "submitted_at": "2019-04-02T23:26:21Z",
    "title_canon_sha256": "60a2f0466256b2610e30aa1d45edfd398d3795da00832346ee27d3bb605c8303"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.02706",
    "kind": "arxiv",
    "version": 1
  }
}