Pith Number

pith:QM2KGBDB

pith:2026:QM2KGBDBUTPPLISFD3UEKPVKZ6

not attested not anchored not stored refs pending

Non-negative Matrix Factorisation with Topological Regularisation

Keunsu Kim, Matias de Jong Van Lier, Shizuo Kaji

arxiv:2606.17531 v1 · 2026-06-16 · cs.LG · cs.CG · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QM2KGBDBUTPPLISFD3UEKPVKZ6}

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	2026-06-19T16:10:15.248061Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8334a30461a4def5a2451ee8453eaacf91a3a45df8f8792a061d80d0a956d980

Aliases

arxiv: 2606.17531 · arxiv_version: 2606.17531v1 · doi: 10.48550/arxiv.2606.17531 · pith_short_12: QM2KGBDBUTPP · pith_short_16: QM2KGBDBUTPPLISF · pith_short_8: QM2KGBDB

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/QM2KGBDBUTPPLISFD3UEKPVKZ6 \
  | 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: 8334a30461a4def5a2451ee8453eaacf91a3a45df8f8792a061d80d0a956d980

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4d13052f5b357e001b9c238c46088dd8b7a1bae8cb08a29b27e38710aa7d8a59",
    "cross_cats_sorted": [
      "cs.CG",
      "math.AT"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2026-06-16T05:15:42Z",
    "title_canon_sha256": "8aa758a5f032254211b6ef63723e8e9490245047139e8150f77fe37e1ee42be9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.17531",
    "kind": "arxiv",
    "version": 1
  }
}