Pith Number

pith:56XO2Z3U

pith:2025:56XO2Z3UQEGIFW5LYOWWIJCMFV

not attested not anchored not stored refs pending

AMPO: Active Multi-Preference Optimization for Self-play Preference Selection

Chetan Bansal, Rahul Madhavan, Saravan Rajmohan, Taneesh Gupta, Xuchao Zhang

arxiv:2502.18293 v2 · 2025-02-25 · cs.LG · cs.AI · cs.CL

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{56XO2Z3UQEGIFW5LYOWWIJCMFV}

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	2026-07-05T11:17:41.972638Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

efaeed6774810c82dbabc3ad64244c2d5fffaf3d42178ac7192ba047d1b684d0

Aliases

arxiv: 2502.18293 · arxiv_version: 2502.18293v2 · doi: 10.48550/arxiv.2502.18293 · pith_short_12: 56XO2Z3UQEGI · pith_short_16: 56XO2Z3UQEGIFW5L · pith_short_8: 56XO2Z3U

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/56XO2Z3UQEGIFW5LYOWWIJCMFV \
  | 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: efaeed6774810c82dbabc3ad64244c2d5fffaf3d42178ac7192ba047d1b684d0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "39dfefcdee3f8261382665173630ab2421a89a088f550841ab9234eb61eb09b9",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.CL"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2025-02-25T15:29:51Z",
    "title_canon_sha256": "dc1b7353417f5e322961fceff82254c8a785a43d6490d82f5081b8af95ce9fb7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2502.18293",
    "kind": "arxiv",
    "version": 2
  }
}