Pith Number

pith:VHTMKXTR

pith:2026:VHTMKXTROLMHH6JLVH7BGTY25B

not attested not anchored not stored refs pending

CPPO: Contrastive Perception Policy Optimization for VLM Agents

Ahmad Rezaei, Kevin Cannons, Mohammad Akbari, Mohammad Asiful Hossain, Mohsen Gholami, Saeed Ranjbar Alvar, Yong Zhang, Zhou Weimin

arxiv:2601.00501 v2 · 2026-01-01 · cs.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VHTMKXTROLMHH6JLVH7BGTY25B}

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	2026-05-28T01:04:34.943755Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a9e6c55e7172d873f92ba9fe134f1ae85b77720e18251d142514fb4151e88138

Aliases

arxiv: 2601.00501 · arxiv_version: 2601.00501v2 · doi: 10.48550/arxiv.2601.00501 · pith_short_12: VHTMKXTROLMH · pith_short_16: VHTMKXTROLMHH6JL · pith_short_8: VHTMKXTR

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/VHTMKXTROLMHH6JLVH7BGTY25B \
  | 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: a9e6c55e7172d873f92ba9fe134f1ae85b77720e18251d142514fb4151e88138

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "987793a34919a6fd73524d02fa84991778e834873ea13518811e73e1177a6fa1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2026-01-01T22:48:26Z",
    "title_canon_sha256": "6b33a37a034d4acc8ef2350ec315f134b96fc2ca947d0d654d067ba3395c3788"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2601.00501",
    "kind": "arxiv",
    "version": 2
  }
}