Pith Number

pith:OBJEUCXV

pith:2018:OBJEUCXVG7CNVPTOU4PJD7PBM6

not attested not anchored not stored refs pending

Zero CR-curvature equations for Levi degenerate hypersurfaces via Pocchiola's invariants

Alexander Isaev

arxiv:1809.03029 v1 · 2018-09-09 · math.CV · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OBJEUCXVG7CNVPTOU4PJD7PBM6}

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	2026-05-18T00:05:13.576228Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

70524a0af537c4dabe6ea71e91fde16797c148f4f74d49a18e2fbaa0e39877e8

Aliases

arxiv: 1809.03029 · arxiv_version: 1809.03029v1 · doi: 10.48550/arxiv.1809.03029 · pith_short_12: OBJEUCXVG7CN · pith_short_16: OBJEUCXVG7CNVPTO · pith_short_8: OBJEUCXV

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/OBJEUCXVG7CNVPTOU4PJD7PBM6 \
  | 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: 70524a0af537c4dabe6ea71e91fde16797c148f4f74d49a18e2fbaa0e39877e8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "87405c5bf4d00c2d18d38902f73beb0d298d1460ac0ecc78b6eee9980e9196c5",
    "cross_cats_sorted": [
      "math.DG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CV",
    "submitted_at": "2018-09-09T19:39:50Z",
    "title_canon_sha256": "2ee90606475de6567896927dcacec0504cc8240b2ac96d482bf29bfbe517c2d3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.03029",
    "kind": "arxiv",
    "version": 1
  }
}