Pith Number

pith:Z56444EO

pith:2026:Z56444EOIC6MTPWLIOM65GDLZR

not attested not anchored not stored refs pending

Gradient Concentration, Not Weight Saliency, Explains Representation-Level Class Unlearning

Alessio Merlo, Billel Habbati, Luca Verderame, Meriem Guerar

arxiv:2607.21353 v1 · 2026-07-23 · 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{Z56444EOIC6MTPWLIOM65GDLZR}

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	2026-07-24T01:24:27.211519Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cf7dce708e40bcc9becb4399ee986bcc6a5b71685eb908f5ca5f6c1b12d50c32

Aliases

arxiv: 2607.21353 · arxiv_version: 2607.21353v1 · doi: 10.48550/arxiv.2607.21353 · pith_short_12: Z56444EOIC6M · pith_short_16: Z56444EOIC6MTPWL · pith_short_8: Z56444EO

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/Z56444EOIC6MTPWLIOM65GDLZR \
  | 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: cf7dce708e40bcc9becb4399ee986bcc6a5b71685eb908f5ca5f6c1b12d50c32

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8260f87c2fb35daf72479ea3e6835d4a19292a43081ba248cff5c9ae9b98d5f2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2026-07-23T14:17:51Z",
    "title_canon_sha256": "d3a5d9d87d556fe459cd7c37e294e606bf6ed799a40a594b8ab347ba6b7ba5d2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.21353",
    "kind": "arxiv",
    "version": 1
  }
}