Pith Number

pith:H3IFIZDI

pith:2025:H3IFIZDI77DDPCRI4UBE2R7AHH

not attested not anchored not stored refs pending

Square$\chi$PO: Differentially Private and Robust $\chi^2$-Preference Optimization in Offline Direct Alignment

Francesco Orabona, Wenqian Weng, Xingyu Zhou, Yulian Wu

arxiv:2505.21395 v1 · 2025-05-27 · 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{H3IFIZDI77DDPCRI4UBE2R7AHH}

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	2026-07-05T11:10:41.375138Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3ed0546468ffc6378a28e5024d47e039f2fbef52d5f5f08eb63a74e48bcfe424

Aliases

arxiv: 2505.21395 · arxiv_version: 2505.21395v1 · doi: 10.48550/arxiv.2505.21395 · pith_short_12: H3IFIZDI77DD · pith_short_16: H3IFIZDI77DDPCRI · pith_short_8: H3IFIZDI

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/H3IFIZDI77DDPCRI4UBE2R7AHH \
  | 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: 3ed0546468ffc6378a28e5024d47e039f2fbef52d5f5f08eb63a74e48bcfe424

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "74039282b99daea87888763748f8fafbbf1e345e21362814715e16af59dff0db",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2025-05-27T16:23:24Z",
    "title_canon_sha256": "12be670d8e171297586108cd955c5b47e74ceee2fcf713f059a21e561b9d363a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.21395",
    "kind": "arxiv",
    "version": 1
  }
}