Pith Number

pith:GKA3W3YS

pith:2017:GKA3W3YSD6NGKXN3RDLBJZWSYG

not attested not anchored not stored refs pending

Newton's equation of motion with quadratic drag force and Toda's potential as a solvable one

Daisuke A. Takahashi

arxiv:1712.09189 v4 · 2017-12-26 · nlin.SI · physics.class-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GKA3W3YSD6NGKXN3RDLBJZWSYG}

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	2026-05-18T00:12:53.720192Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3281bb6f121f9a655dbb88d614e6d2c1b42b8a7bb47bd02cba243e1f8a1a779b

Aliases

arxiv: 1712.09189 · arxiv_version: 1712.09189v4 · doi: 10.48550/arxiv.1712.09189 · pith_short_12: GKA3W3YSD6NG · pith_short_16: GKA3W3YSD6NGKXN3 · pith_short_8: GKA3W3YS

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/GKA3W3YSD6NGKXN3RDLBJZWSYG \
  | 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: 3281bb6f121f9a655dbb88d614e6d2c1b42b8a7bb47bd02cba243e1f8a1a779b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a2d8e3a796d2e27c2dcc437e2ac043f849609bee82aaefb4b5fbfa63d952210e",
    "cross_cats_sorted": [
      "physics.class-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "nlin.SI",
    "submitted_at": "2017-12-26T06:51:58Z",
    "title_canon_sha256": "3a2aa3dbefc91a3353a20906a68bbd74df779921f128d7d50d7e001904f83166"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1712.09189",
    "kind": "arxiv",
    "version": 4
  }
}