Pith Number

pith:K4PHY3MP

pith:2025:K4PHY3MPHDJJI2LBKPGRMWESBF

not attested not anchored not stored refs pending

Are Sparse Autoencoders Useful? A Case Study in Sparse Probing

Joshua Engels, Max Tegmark, Neel Nanda, Senthooran Rajamanoharan, Subhash Kantamneni

arxiv:2502.16681 v1 · 2025-02-23 · cs.LG · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{K4PHY3MPHDJJI2LBKPGRMWESBF}

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

7 papers in Pith

ICA Lens: Interpreting Language Models Without Training Another Dictionary

Are Sparse Autoencoder Benchmarks Reliable?

Descriptive Collision in Sparse Autoencoder Auto-Interpretability: When One Explanation Describes Many Features

Self-ReSET: Learning to Self-Recover from Unsafe Reasoning Trajectories

Improving Robustness In Sparse Autoencoders via Masked Regularization

Receipt and verification

First computed	2026-07-05T10:18:57.532250Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

571e7c6d8f38d294696153cd165892097ce985e83a325f25d60b3a7386b47b4c

Aliases

arxiv: 2502.16681 · arxiv_version: 2502.16681v1 · doi: 10.48550/arxiv.2502.16681 · pith_short_12: K4PHY3MPHDJJ · pith_short_16: K4PHY3MPHDJJI2LB · pith_short_8: K4PHY3MP

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/K4PHY3MPHDJJI2LBKPGRMWESBF \
  | 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: 571e7c6d8f38d294696153cd165892097ce985e83a325f25d60b3a7386b47b4c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ece3924a61efb52ed583b69d7b472f4923072896a7af958c240242609fa5c58a",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2025-02-23T18:54:15Z",
    "title_canon_sha256": "1efd0a18ef89a2dbfb52a4a3a20a352050ca8f674b25e0e00466f62b99b374b7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2502.16681",
    "kind": "arxiv",
    "version": 1
  }
}