Pith Number

pith:T4MAKGGR

pith:2026:T4MAKGGRUSXVU4JYCLCFQU7DLO

not attested not anchored not stored refs pending

PS-PPO: Prefix-Sampling PPO for Critic-Free RLHF

Doo Hwan Hwang, Kee-Eung Kim

arxiv:2606.29758 v1 · 2026-06-29 · 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{T4MAKGGRUSXVU4JYCLCFQU7DLO}

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	2026-06-30T02:17:33.910546Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9f180518d1a4af5a713812c45853e35b8e00a0b15d5868b0d6b3043bb684f01e

Aliases

arxiv: 2606.29758 · arxiv_version: 2606.29758v1 · doi: 10.48550/arxiv.2606.29758 · pith_short_12: T4MAKGGRUSXV · pith_short_16: T4MAKGGRUSXVU4JY · pith_short_8: T4MAKGGR

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/T4MAKGGRUSXVU4JYCLCFQU7DLO \
  | 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: 9f180518d1a4af5a713812c45853e35b8e00a0b15d5868b0d6b3043bb684f01e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "28ce8172cb9866a5c2f504e1c5ed3c42d5cc2b6558a771146d51a106a4e24ac0",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2026-06-29T04:04:32Z",
    "title_canon_sha256": "87f889aa9c35e2edfad5db528edd5a5c4ba5c9e7d3ac0e9c2b956d8ed26a0982"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.29758",
    "kind": "arxiv",
    "version": 1
  }
}