Pith Number

pith:JWW32DJA

pith:2018:JWW32DJA5PL26ESBAOWO25LL4L

not attested not anchored not stored refs pending

The point equivalence problem for ordinary differential equations of the second order

Oleg I. Morozov

arxiv:1801.09248 v1 · 2018-01-28 · math.DG · 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{JWW32DJA5PL26ESBAOWO25LL4L}

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	2026-05-18T00:24:58.068979Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4dadbd0d20ebd7af124103aced756be2ec22a7d96e39f6dea8c9c83b15d9f6bf

Aliases

arxiv: 1801.09248 · arxiv_version: 1801.09248v1 · doi: 10.48550/arxiv.1801.09248 · pith_short_12: JWW32DJA5PL2 · pith_short_16: JWW32DJA5PL26ESB · pith_short_8: JWW32DJA

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/JWW32DJA5PL26ESBAOWO25LL4L \
  | 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: 4dadbd0d20ebd7af124103aced756be2ec22a7d96e39f6dea8c9c83b15d9f6bf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "705fa6016c23e80365b96a43f1d8d2e4bc8c4bc3077869d1f3320cf47bb52d2a",
    "cross_cats_sorted": [
      "math.CA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2018-01-28T16:46:23Z",
    "title_canon_sha256": "289fd8f4b30ed6543222ca61fca393b34186b1a078e50eb880e6b24f53f1bb0d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.09248",
    "kind": "arxiv",
    "version": 1
  }
}