Pith Number

pith:VDGSVIU7

pith:2018:VDGSVIU7AM4D2LT3FV4FCE5GRW

not attested not anchored not stored refs pending

Nullity of the Levi-form and the associated subvarieties for pseudo-convex CR structures of hypersurface type

Chong-Kyu Han, Kuerak Chung

arxiv:1802.02294 v1 · 2018-02-07 · 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{VDGSVIU7AM4D2LT3FV4FCE5GRW}

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	2026-05-18T00:24:08.639255Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a8cd2aa29f03383d2e7b2d785113a68db7ec7cad2a480b81b1164a28a64970c7

Aliases

arxiv: 1802.02294 · arxiv_version: 1802.02294v1 · doi: 10.48550/arxiv.1802.02294 · pith_short_12: VDGSVIU7AM4D · pith_short_16: VDGSVIU7AM4D2LT3 · pith_short_8: VDGSVIU7

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/VDGSVIU7AM4D2LT3FV4FCE5GRW \
  | 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: a8cd2aa29f03383d2e7b2d785113a68db7ec7cad2a480b81b1164a28a64970c7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2a9b96ac5d52d71137652d11c65f4011f41cb8a0e6137aac3588060846b9fd04",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2018-02-07T03:10:17Z",
    "title_canon_sha256": "cb3549f87dc93600b5ce3b32789f1131bd75829bd356b0a33b143841aba58027"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.02294",
    "kind": "arxiv",
    "version": 1
  }
}