Pith Number

pith:QBNAEC74

pith:2018:QBNAEC74LQ4H3E7AFAA2T6RX5B

not attested not anchored not stored refs pending

Solution to Briot and Bouquet problem on singularities of differential equations

Ricardo Perez-Marco

arxiv:1802.03630 v4 · 2018-02-10 · math.DS · math.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QBNAEC74LQ4H3E7AFAA2T6RX5B}

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	2026-05-18T00:21:56.565952Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

805a020bfc5c387d93e02801a9fa37e871acdec23470d0666830cce7bda60d67

Aliases

arxiv: 1802.03630 · arxiv_version: 1802.03630v4 · doi: 10.48550/arxiv.1802.03630 · pith_short_12: QBNAEC74LQ4H · pith_short_16: QBNAEC74LQ4H3E7A · pith_short_8: QBNAEC74

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/QBNAEC74LQ4H3E7AFAA2T6RX5B \
  | 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: 805a020bfc5c387d93e02801a9fa37e871acdec23470d0666830cce7bda60d67

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "097f9ac15b1c78088797ebc49cfeb3fd8d56e0a04652a70323506646aaef6988",
    "cross_cats_sorted": [
      "math.CV"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DS",
    "submitted_at": "2018-02-10T18:09:08Z",
    "title_canon_sha256": "91266b6c844f512118af1f6b07362b0b1ae1bd1872498e68b7199dca3f74a17d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.03630",
    "kind": "arxiv",
    "version": 4
  }
}