Pith Number

pith:MPTK2GGR

pith:2016:MPTK2GGRAGKWXXNDBI4E6LIWSJ

not attested not anchored not stored refs pending

A Sparse PCA Approach to Clustering

Linjun Zhang, T.Tony Cai

arxiv:1602.05236 v1 · 2016-02-16 · stat.ME · 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{MPTK2GGRAGKWXXNDBI4E6LIWSJ}

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	2026-05-18T01:20:28.808755Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

63e6ad18d101956bdda30a384f2d16926bbb96f0957fc43ecc0c8cb549b09639

Aliases

arxiv: 1602.05236 · arxiv_version: 1602.05236v1 · doi: 10.48550/arxiv.1602.05236 · pith_short_12: MPTK2GGRAGKW · pith_short_16: MPTK2GGRAGKWXXND · pith_short_8: MPTK2GGR

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/MPTK2GGRAGKWXXNDBI4E6LIWSJ \
  | 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: 63e6ad18d101956bdda30a384f2d16926bbb96f0957fc43ecc0c8cb549b09639

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6d5c21b2809b4d6de2e65cf8955f88839df1eab721a860300f8db41731e7d0d3",
    "cross_cats_sorted": [
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2016-02-16T22:49:41Z",
    "title_canon_sha256": "4f4ce8e303cb2b2bc189a60d8c45807122dcbbf9c6021c5880211d294be74018"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.05236",
    "kind": "arxiv",
    "version": 1
  }
}