Pith Number

pith:L3CZPBVB

pith:2026:L3CZPBVBFUOT4DLWAVW47Q4FIY

not attested not anchored not stored refs pending

BiasGRPO: Stabilizing Bias Mitigation in High-Variance Reward Landscapes via Group-Relative Policy Optimization

ChengXiang Zhai, Ke Yang, Saket Reddy

arxiv:2606.04807 v1 · 2026-06-03 · cs.AI · cs.CL · cs.CY · 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{L3CZPBVBFUOT4DLWAVW47Q4FIY}

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	2026-06-04T01:09:30.779712Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5ec59786a12d1d3e0d76056dcfc38546083fc2b0dafdf993c5c84dfe5611a738

Aliases

arxiv: 2606.04807 · arxiv_version: 2606.04807v1 · doi: 10.48550/arxiv.2606.04807 · pith_short_12: L3CZPBVBFUOT · pith_short_16: L3CZPBVBFUOT4DLW · pith_short_8: L3CZPBVB

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/L3CZPBVBFUOT4DLWAVW47Q4FIY \
  | 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: 5ec59786a12d1d3e0d76056dcfc38546083fc2b0dafdf993c5c84dfe5611a738

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e78a234df3fff9e89b0b9d316463df8d95269fa8f5e7cd871350a2b831fcbbe0",
    "cross_cats_sorted": [
      "cs.CL",
      "cs.CY",
      "cs.LG"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2026-06-03T12:31:42Z",
    "title_canon_sha256": "7b4f83104f176a6a5f0bef16577617fc2c05395468cc29a02759ca80a639404c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.04807",
    "kind": "arxiv",
    "version": 1
  }
}