Pith Number

pith:4ECJ7NSI

pith:2026:4ECJ7NSIJ3CNALBNHGA7R7DWHB

not attested not anchored not stored refs pending

FlowPRO: Reward-Free Reinforced Fine-Tuning of Flow-Matching VLAs via Proximalized Preference Optimization

He Zhang, Junbo Tan, Xueqian Wang, Yihao Wu, Zhengyou Zhang

arxiv:2606.05468 v1 · 2026-06-03 · cs.RO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4ECJ7NSIJ3CNALBNHGA7R7DWHB}

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	2026-06-05T01:14:52.087196Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e1049fb6484ec4d02c2d3981f8fc76386f12db46ed31bd15402971b968425532

Aliases

arxiv: 2606.05468 · arxiv_version: 2606.05468v1 · doi: 10.48550/arxiv.2606.05468 · pith_short_12: 4ECJ7NSIJ3CN · pith_short_16: 4ECJ7NSIJ3CNALBN · pith_short_8: 4ECJ7NSI

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/4ECJ7NSIJ3CNALBNHGA7R7DWHB \
  | 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: e1049fb6484ec4d02c2d3981f8fc76386f12db46ed31bd15402971b968425532

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "efd205a20d1bf34c551e01d7a7a41c70bc9cc844bd2581c8d070f86f9f6304a2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.RO",
    "submitted_at": "2026-06-03T21:47:43Z",
    "title_canon_sha256": "5c8cbfb9b194c39cc0fba0cd55c3150391b0bcd3310a60beb559b487b0f169f6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.05468",
    "kind": "arxiv",
    "version": 1
  }
}