Pith Number

pith:76PMB7WC

pith:2017:76PMB7WCBCXR55OOSKQ73VT7SI

not attested not anchored not stored refs pending

Clustering is semidefinitely not that hard: Nonnegative SDP for manifold disentangling

Anirvan M. Sengupta, Dmitri Chklovskii, Mariano Tepper

arxiv:1706.06028 v4 · 2017-06-19 · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{76PMB7WCBCXR55OOSKQ73VT7SI}

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	2026-05-18T00:06:26.530949Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ff9ec0fec208af1ef5ce92a1fdd67f92313d6913b480b458bbf448f6ab7773b0

Aliases

arxiv: 1706.06028 · arxiv_version: 1706.06028v4 · doi: 10.48550/arxiv.1706.06028 · pith_short_12: 76PMB7WCBCXR · pith_short_16: 76PMB7WCBCXR55OO · pith_short_8: 76PMB7WC

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/76PMB7WCBCXR55OOSKQ73VT7SI \
  | 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: ff9ec0fec208af1ef5ce92a1fdd67f92313d6913b480b458bbf448f6ab7773b0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a15c360554fbb064a06644e40efe21ad16b152d10b4c1807bc35e1e22dfac531",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2017-06-19T15:57:12Z",
    "title_canon_sha256": "70a87680fbd3b852e7092adb75340d72b1b045a0c7eaad42403b04e0ae29f4f7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1706.06028",
    "kind": "arxiv",
    "version": 4
  }
}