Pith Number

pith:MULZLS7H

pith:2026:MULZLS7HDBBOPG427ZX6RDYG3O

not attested not anchored not stored refs pending

SERPO: Self-Evolving Rubric Policy Optimization for Open-Ended Test-Time Reinforcement Learning

Hua Yang, Jianze Wang, Jinlong Chen, Kunwang Zheng, Qianglong Chen, Qilong Zhang, Ying Liu, Yu Cao

arxiv:2607.26873 v1 · 2026-07-29 · 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{MULZLS7HDBBOPG427ZX6RDYG3O}

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	2026-07-30T01:22:50.354964Z
Builder	pith-number-builder-2026-05-17-v1
Signature	unsigned_v0
Schema	pith-number/v1.0

Canonical hash

651795cbe71842e79b9afe6fe88f06db8dddf7744da7622826199f11d317a364

Aliases

arxiv: 2607.26873 · arxiv_version: 2607.26873v1 · doi: 10.48550/arxiv.2607.26873 · pith_short_12: MULZLS7HDBBO · pith_short_16: MULZLS7HDBBOPG42 · pith_short_8: MULZLS7H

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/MULZLS7HDBBOPG427ZX6RDYG3O \
  | 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: 651795cbe71842e79b9afe6fe88f06db8dddf7744da7622826199f11d317a364

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3040e19887fabb366990990589c2ca8271a3a20c1764901eeb3fded84b189eb0",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2026-07-29T13:03:07Z",
    "title_canon_sha256": "c04eab36a0bd3750bf7c81d4d163f8bf5f8cbbd6e9b68cda19d16a8801543202"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.26873",
    "kind": "arxiv",
    "version": 1
  }
}