Pith Number

pith:F5TXYUZT

pith:2019:F5TXYUZTA26WX5X6QVSHSNH2GL

not attested not anchored not stored refs pending

Spherical Principal Component Analysis

Gongguo Tang, Hua Wang, Kai Liu, Qiuwei Li

arxiv:1903.06877 v1 · 2019-03-16 · cs.LG · math.OC · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{F5TXYUZTA26WX5X6QVSHSNH2GL}

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	2026-05-17T23:51:08.730465Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2f677c533306bd6bf6fe85647934fa32e174e3aeb5d5517970f2990281038950

Aliases

arxiv: 1903.06877 · arxiv_version: 1903.06877v1 · doi: 10.48550/arxiv.1903.06877 · pith_short_12: F5TXYUZTA26W · pith_short_16: F5TXYUZTA26WX5X6 · pith_short_8: F5TXYUZT

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/F5TXYUZTA26WX5X6QVSHSNH2GL \
  | 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: 2f677c533306bd6bf6fe85647934fa32e174e3aeb5d5517970f2990281038950

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "608cf67cd4d1a1b255b53a131306d2daa570f8a6314080872118933d97d3e002",
    "cross_cats_sorted": [
      "math.OC",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2019-03-16T04:18:33Z",
    "title_canon_sha256": "c39e00d847a00e49b0e78e3dd988e775331d0b72d3aab6edece0f3cde97a1195"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.06877",
    "kind": "arxiv",
    "version": 1
  }
}