Pith Number

pith:TA6ZH6EB

pith:2026:TA6ZH6EBTIK23VE4FTHDN455IM

not attested not anchored not stored refs pending

SAPO: Step-Aligned Policy Optimization for Reasoning-Based Generative Recommendation

Chen Chen, Guanghui Min, Jundong Li, Liangjie Hong, Liang Wu, Yaochen Zhu, Zaiyi Zheng

arxiv:2605.17648 v1 · 2026-05-17 · 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{TA6ZH6EBTIK23VE4FTHDN455IM}

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	2026-05-20T00:04:50.471258Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

983d93f8819a15add49c2cce36f3bd430928ea690e589a4d4db29f2cbced6030

Aliases

arxiv: 2605.17648 · arxiv_version: 2605.17648v1 · doi: 10.48550/arxiv.2605.17648 · pith_short_12: TA6ZH6EBTIK2 · pith_short_16: TA6ZH6EBTIK23VE4 · pith_short_8: TA6ZH6EB

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/TA6ZH6EBTIK23VE4FTHDN455IM \
  | 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: 983d93f8819a15add49c2cce36f3bd430928ea690e589a4d4db29f2cbced6030

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4d4f40a6f76baf4d0d4c096f5f6d982819afa9330defb3fe4bdf73802098c85f",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2026-05-17T20:53:08Z",
    "title_canon_sha256": "7b092f45809a2c45d50a94681fbc71eab609cdeb3098b9023251d41005b7f464"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.17648",
    "kind": "arxiv",
    "version": 1
  }
}