Pith Number

pith:RY6ISREC

pith:2019:RY6ISRECYVZBSYVCAX7NWZ7AVB

not attested not anchored not stored refs pending

On Heinz type inequality for the half-plane and Gaussian curvature of Minimal surfaces

David Kalaj

arxiv:1901.06642 v1 · 2019-01-20 · 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{RY6ISRECYVZBSYVCAX7NWZ7AVB}

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	2026-05-17T23:55:49.572770Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8e3c894482c5721962a205fedb67e0a840ec6805eccbefc88a4b2950f331f9b2

Aliases

arxiv: 1901.06642 · arxiv_version: 1901.06642v1 · doi: 10.48550/arxiv.1901.06642 · pith_short_12: RY6ISRECYVZB · pith_short_16: RY6ISRECYVZBSYVC · pith_short_8: RY6ISREC

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/RY6ISRECYVZBSYVCAX7NWZ7AVB \
  | 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: 8e3c894482c5721962a205fedb67e0a840ec6805eccbefc88a4b2950f331f9b2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "89bad5473f39edced16d943ebef4231c4f706e5c438eafad6ed10063a3870550",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CV",
    "submitted_at": "2019-01-20T08:57:00Z",
    "title_canon_sha256": "4734e60e7f408350186cded43d50cc4dec0727fe56c6b6512441531f1b66809e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.06642",
    "kind": "arxiv",
    "version": 1
  }
}