Pith Number

pith:CZF5FQS5

pith:2025:CZF5FQS5LN7UB7ZNTXOOOVJZHY

not attested not anchored not stored refs pending

What Is Preference Optimization Doing, and Why?

Bo Han, Gang Niu, Masashi Sugiyama, Qizhou Wang, Yue Wang, Zizhuo Zhang

arxiv:2512.00778 v2 · 2025-11-30 · 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{CZF5FQS5LN7UB7ZNTXOOOVJZHY}

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	2026-05-20T00:00:29.085323Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

164bd2c25d5b7f40ff2d9ddce755393e13871139542bb6321c4781c3509bec1d

Aliases

arxiv: 2512.00778 · arxiv_version: 2512.00778v2 · doi: 10.48550/arxiv.2512.00778 · pith_short_12: CZF5FQS5LN7U · pith_short_16: CZF5FQS5LN7UB7ZN · pith_short_8: CZF5FQS5

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/CZF5FQS5LN7UB7ZNTXOOOVJZHY \
  | 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: 164bd2c25d5b7f40ff2d9ddce755393e13871139542bb6321c4781c3509bec1d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4c702ee26d076bb2c2d0231385a77a64bfac6c3db6d0a366123eb311a2e2a796",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2025-11-30T08:27:59Z",
    "title_canon_sha256": "484e4705e58a8141dd6c83d956e894a2e4dfaed184896d56a26756771aaa94ed"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2512.00778",
    "kind": "arxiv",
    "version": 2
  }
}