Pith Number

pith:4EZRUBFT

pith:2015:4EZRUBFTLIS5XOBBWJ7HZ7LV3A

not attested not anchored not stored refs pending

Complete Group Classification of Systems of Two Nonlinear Second-Order Ordinary Differential Equations of the Form ${\bf y}^{\prime\prime}={\bf F}({\bf y})$

Giovanna Fae Oguis, Sergey Meleshko, Sibusiso Moyo

arxiv:1507.05475 v4 · 2015-07-20 · math.CA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4EZRUBFTLIS5XOBBWJ7HZ7LV3A}

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	2026-05-18T01:21:08.534261Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e1331a04b35a25dbb821b27e7cfd75d80db7e170ad3ef70a6da9ccf85d13d059

Aliases

arxiv: 1507.05475 · arxiv_version: 1507.05475v4 · doi: 10.48550/arxiv.1507.05475 · pith_short_12: 4EZRUBFTLIS5 · pith_short_16: 4EZRUBFTLIS5XOBB · pith_short_8: 4EZRUBFT

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/4EZRUBFTLIS5XOBBWJ7HZ7LV3A \
  | 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: e1331a04b35a25dbb821b27e7cfd75d80db7e170ad3ef70a6da9ccf85d13d059

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "98613f7a9a9d30392344f077a715409de1d01c9d22d798590ddac852deabdc25",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CA",
    "submitted_at": "2015-07-20T12:52:49Z",
    "title_canon_sha256": "679fd66989255b94f28b71b998821986893874d4f042c606f42eef6a93b10938"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.05475",
    "kind": "arxiv",
    "version": 4
  }
}