Pith Number

pith:7XXD53ZV

pith:2026:7XXD53ZVILIQSOYY4DUGYIUGFJ

not attested not anchored not stored refs pending

Preference Instability in Reward Models: Detection and Mitigation via Sparse Autoencoders

Belen Martin Urcelay, Francesco Croce, Shunchang Liu, Xin Chen

arxiv:2605.16339 v1 · 2026-05-07 · 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{7XXD53ZVILIQSOYY4DUGYIUGFJ}

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	2026-05-20T00:02:17.428692Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fdee3eef3542d1093b18e0e86c22862a4a8f4c961fad475bbaa1f54ea737f5a0

Aliases

arxiv: 2605.16339 · arxiv_version: 2605.16339v1 · doi: 10.48550/arxiv.2605.16339 · pith_short_12: 7XXD53ZVILIQ · pith_short_16: 7XXD53ZVILIQSOYY · pith_short_8: 7XXD53ZV

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/7XXD53ZVILIQSOYY4DUGYIUGFJ \
  | 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: fdee3eef3542d1093b18e0e86c22862a4a8f4c961fad475bbaa1f54ea737f5a0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f36363aeb17278e6614f92c09d803c81c6412260aa44d7144dc425abb4752387",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2026-05-07T16:48:48Z",
    "title_canon_sha256": "0325f8519ecda770bf59ea176cf534a0d557d5bd580a2d466092b37b6364f9bb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.16339",
    "kind": "arxiv",
    "version": 1
  }
}