Pith Number

pith:RDIJREXQ

pith:2025:RDIJREXQHPSWTOEKFZBB2BBD5M

not attested not anchored not stored refs pending

Sparse but Wrong: Incorrect L0 Leads to Incorrect Features in Sparse Autoencoders

Adri\`a Garriga-Alonso, David Chanin

arxiv:2508.16560 v4 · 2025-08-22 · cs.LG · cs.AI · cs.CL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RDIJREXQHPSWTOEKFZBB2BBD5M}

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.

Cited by

1 paper in Pith

Perplexity Can Miss SAE Feature Damage Under Quantization

Receipt and verification

First computed	2026-07-08T01:18:19.823281Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

88d09892f03be569b88a2e421d0423eb2448ab0c387bba0f31acf1f077c61a6a

Aliases

arxiv: 2508.16560 · arxiv_version: 2508.16560v4 · doi: 10.48550/arxiv.2508.16560 · pith_short_12: RDIJREXQHPSW · pith_short_16: RDIJREXQHPSWTOEK · pith_short_8: RDIJREXQ

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/RDIJREXQHPSWTOEKFZBB2BBD5M \
  | 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: 88d09892f03be569b88a2e421d0423eb2448ab0c387bba0f31acf1f077c61a6a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "304fa5e638d32d004b31adc5539391e6907171e7cc11454e5368202a06a36a00",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.CL"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2025-08-22T17:26:33Z",
    "title_canon_sha256": "7556e92e04c7ad15fed6b38942ad1747a51976642a4d4bbe2440a10b63f821b6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2508.16560",
    "kind": "arxiv",
    "version": 4
  }
}