Pith Number

pith:6LSFGJGR

pith:2019:6LSFGJGR2V2WBLJMWFLF65YM7H

not attested not anchored not stored refs pending

Construction of the similarity matrix for the spectral clustering method: numerical experiments

Francesco Romani, Grazia Lotti, Ornella Menchi, Paola Favati

arxiv:1904.11352 v1 · 2019-04-24 · math.NA · 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{6LSFGJGR2V2WBLJMWFLF65YM7H}

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	2026-05-17T23:47:45.147237Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f2e45324d1d57560ad2cb1565f770cf9c444ac36005942ff51f6e0906627d42b

Aliases

arxiv: 1904.11352 · arxiv_version: 1904.11352v1 · doi: 10.48550/arxiv.1904.11352 · pith_short_12: 6LSFGJGR2V2W · pith_short_16: 6LSFGJGR2V2WBLJM · pith_short_8: 6LSFGJGR

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/6LSFGJGR2V2WBLJMWFLF65YM7H \
  | 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: f2e45324d1d57560ad2cb1565f770cf9c444ac36005942ff51f6e0906627d42b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7696fa6267558ab368ce3f9fbfddd832b4758bc1a2ab6855573d9d8d6a4d8db3",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-04-24T07:51:59Z",
    "title_canon_sha256": "6885299c7cb30d11c6a5fc6942d90c975b79cd2f007018b0a35bd7200eebd8ee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.11352",
    "kind": "arxiv",
    "version": 1
  }
}