Pith Number

pith:A3G2TL4F

pith:2026:A3G2TL4F66AZ5Q3IVIQLYCXYFK

not attested not anchored not stored refs pending

More Convincing, Not More Correct: Self-Play Reward Hacking of Reference-Free LLM Judges

Chenyu Zhou

arxiv:2607.05904 v1 · 2026-07-07 · 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{A3G2TL4F66AZ5Q3IVIQLYCXYFK}

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	2026-07-08T01:18:49.783970Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

06cda9af85f7819ec368aa20bc0af82ab1d8f7fc93a62ed22db78ccd72573d61

Aliases

arxiv: 2607.05904 · arxiv_version: 2607.05904v1 · doi: 10.48550/arxiv.2607.05904 · pith_short_12: A3G2TL4F66AZ · pith_short_16: A3G2TL4F66AZ5Q3I · pith_short_8: A3G2TL4F

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/A3G2TL4F66AZ5Q3IVIQLYCXYFK \
  | 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: 06cda9af85f7819ec368aa20bc0af82ab1d8f7fc93a62ed22db78ccd72573d61

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "79b0082dbd69e42b8bbd591f7a2b252fc50197612e224cc9fbd7c424e56d527d",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2026-07-07T06:59:30Z",
    "title_canon_sha256": "3e2f066b7e345d2cecadd0c5a19a90b3a2d08bc757c19e27d5c340ad0ac4c80f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.05904",
    "kind": "arxiv",
    "version": 1
  }
}