Pith Number

pith:6RDEEJZ7

pith:2025:6RDEEJZ74HDZ2BNOJP3GYJEU6E

not attested not anchored not stored refs pending

Difficulty-Based Preference Data Selection by DPO Implicit Reward Gap

Rongwu Xu, Xuan Qi, Zhijing Jin

arxiv:2508.04149 v2 · 2025-08-06 · cs.CL · cs.AI · 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{6RDEEJZ74HDZ2BNOJP3GYJEU6E}

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

1 paper in Pith

Data Difficulty and the Generalization--Extrapolation Tradeoff in LLM Fine-Tuning

Receipt and verification

First computed	2026-05-20T00:02:52.602696Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f44642273fe1c79d05ae4bf66c2494f1089f0c0ba926d5bb968652f704dc2f37

Aliases

arxiv: 2508.04149 · arxiv_version: 2508.04149v2 · doi: 10.48550/arxiv.2508.04149 · pith_short_12: 6RDEEJZ74HDZ · pith_short_16: 6RDEEJZ74HDZ2BNO · pith_short_8: 6RDEEJZ7

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/6RDEEJZ74HDZ2BNOJP3GYJEU6E \
  | 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: f44642273fe1c79d05ae4bf66c2494f1089f0c0ba926d5bb968652f704dc2f37

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3effde57a54ab1ce8aacd8278f43a92e2e77aefd94836498c3d2e06d23fb380c",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.LG"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2025-08-06T07:24:14Z",
    "title_canon_sha256": "d7754273c29b1f20e16c82fca7121d7f49decdfa93fc2839e6ef324946704c6c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2508.04149",
    "kind": "arxiv",
    "version": 2
  }
}