Pith Number

pith:WPNQQFZS

pith:2015:WPNQQFZSH26NCPDE5QQFONGGER

not attested not anchored not stored refs pending

CudaChain: A Practical GPU-accelerated 2D Convex Hull Algorithm

Gang Mei

arxiv:1508.05488 v1 · 2015-08-22 · cs.CG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WPNQQFZSH26NCPDE5QQFONGGER}

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	2026-05-18T01:14:17.896606Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b3db0817323ebcd13c64ec205734c624689b3c8857f48c8d57b2064fe5e60f9e

Aliases

arxiv: 1508.05488 · arxiv_version: 1508.05488v1 · doi: 10.48550/arxiv.1508.05488 · pith_short_12: WPNQQFZSH26N · pith_short_16: WPNQQFZSH26NCPDE · pith_short_8: WPNQQFZS

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/WPNQQFZSH26NCPDE5QQFONGGER \
  | 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: b3db0817323ebcd13c64ec205734c624689b3c8857f48c8d57b2064fe5e60f9e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "45d22cc9ce81bfb37f91918cb65c60e049697b6e909b9b0fb391db380eb9a8e4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2015-08-22T09:32:11Z",
    "title_canon_sha256": "4f93bb87809e78701d29358d903341089e9fa43fcbf39f00203f4e7ab85f5c23"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.05488",
    "kind": "arxiv",
    "version": 1
  }
}