Pith Number

pith:C2W4PSBH

pith:2026:C2W4PSBHAXQ2ELQ44Z5CIXPFM4

not attested not anchored not stored refs pending

A Nonmonotone Gradient-Based Algorithm for Symmetric Nonnegative Matrix Factorization and Graph Clustering

Johannes Brust, Ryan Swart

arxiv:2606.02887 v1 · 2026-06-01 · cs.LG · cs.NA · math.NA · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{C2W4PSBHAXQ2ELQ44Z5CIXPFM4}

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	2026-06-03T01:05:25.738972Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

16adc7c82705e1a22e1ce67a245de567097e7fa8f798c61cd1dfde88a487a717

Aliases

arxiv: 2606.02887 · arxiv_version: 2606.02887v1 · doi: 10.48550/arxiv.2606.02887 · pith_short_12: C2W4PSBHAXQ2 · pith_short_16: C2W4PSBHAXQ2ELQ4 · pith_short_8: C2W4PSBH

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/C2W4PSBHAXQ2ELQ44Z5CIXPFM4 \
  | 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: 16adc7c82705e1a22e1ce67a245de567097e7fa8f798c61cd1dfde88a487a717

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "910ad0049b37bef6ee73098b4193460eea600ef75565410699283204b98ab075",
    "cross_cats_sorted": [
      "cs.NA",
      "math.NA",
      "math.OC"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2026-06-01T20:59:33Z",
    "title_canon_sha256": "d4616fa278baac461bc188a475bbeb5b752e8f64c37e23e3ceb5c60fdefa48f1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.02887",
    "kind": "arxiv",
    "version": 1
  }
}