Pith Number

pith:KP6SEKXV

pith:2019:KP6SEKXVMG7YCE3G3L4J4DIE5G

not attested not anchored not stored refs pending

Upper bound of second Hankel determinant of subclass of bi-univalent functions defined by subordination

Alaa H. El-Qadeem, Mohamed A. Mamon

arxiv:1908.07350 v1 · 2019-08-08 · 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{KP6SEKXVMG7YCE3G3L4J4DIE5G}

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	2026-07-04T23:58:33.519019Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

53fd222af561bf811366daf89e0d04e9867f288f5e41dbe1294a4c500454f824

Aliases

arxiv: 1908.07350 · arxiv_version: 1908.07350v1 · doi: 10.48550/arxiv.1908.07350 · pith_short_12: KP6SEKXVMG7Y · pith_short_16: KP6SEKXVMG7YCE3G · pith_short_8: KP6SEKXV

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/KP6SEKXVMG7YCE3G3L4J4DIE5G \
  | 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: 53fd222af561bf811366daf89e0d04e9867f288f5e41dbe1294a4c500454f824

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cddc8a91912ef83292a9b4fe7c111979cc3052da552bfe9b3cf7c463a4bde71f",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/publicdomain/zero/1.0/",
    "primary_cat": "math.CV",
    "submitted_at": "2019-08-08T12:43:21Z",
    "title_canon_sha256": "abeff7d6637831f3726c80129766b3e7d84e5c8b6f4746ed55856c08486c3000"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.07350",
    "kind": "arxiv",
    "version": 1
  }
}