Pith Number

pith:EXXNTPU3

pith:2019:EXXNTPU3576H3KO4RUAD5SMNP7

not attested not anchored not stored refs pending

Rigid Levi degenerate hypersurfaces with vanishing CR-curvature

Alexander Isaev

arxiv:1901.03044 v1 · 2019-01-10 · 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{EXXNTPU3576H3KO4RUAD5SMNP7}

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	2026-05-17T23:56:35.701484Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

25eed9be9beffc7da9dc8d003ec98d7fec6b7ed2abf17a525e053a1772ec7e30

Aliases

arxiv: 1901.03044 · arxiv_version: 1901.03044v1 · doi: 10.48550/arxiv.1901.03044 · pith_short_12: EXXNTPU3576H · pith_short_16: EXXNTPU3576H3KO4 · pith_short_8: EXXNTPU3

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/EXXNTPU3576H3KO4RUAD5SMNP7 \
  | 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: 25eed9be9beffc7da9dc8d003ec98d7fec6b7ed2abf17a525e053a1772ec7e30

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f01875d1c55fad24752c3f4671eef486239f9bbe75b7bdd9ec524ff15638a4bc",
    "cross_cats_sorted": [
      "math.DG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CV",
    "submitted_at": "2019-01-10T07:35:37Z",
    "title_canon_sha256": "b6f6e42c807e07e2edac0dc27f687d3951527de4c0f2f8ce09d1ec868d9065bd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.03044",
    "kind": "arxiv",
    "version": 1
  }
}