Pith Number

pith:RF5V6DHQ

pith:2026:RF5V6DHQFGFLCJCTWAWZE7MQ2P

not attested not anchored not stored refs pending

PortraitGen: Exemplar-Driven GRPO with Dual-Reward Guidance for Photorealistic Portrait Generation

Chen Li, Huchuan Lu, Jing Lyu, Qian Liang, Xiaomin Li, Xu Jia, Yinan Li, Ying Zhang

arxiv:2606.26930 v1 · 2026-06-25 · 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{RF5V6DHQFGFLCJCTWAWZE7MQ2P}

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	2026-06-26T01:16:04.410073Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

897b5f0cf0298ab12453b02d927d90d3e15dcff1864b203cb1c401b7cc13c8e3

Aliases

arxiv: 2606.26930 · arxiv_version: 2606.26930v1 · doi: 10.48550/arxiv.2606.26930 · pith_short_12: RF5V6DHQFGFL · pith_short_16: RF5V6DHQFGFLCJCT · pith_short_8: RF5V6DHQ

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/RF5V6DHQFGFLCJCTWAWZE7MQ2P \
  | 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: 897b5f0cf0298ab12453b02d927d90d3e15dcff1864b203cb1c401b7cc13c8e3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "04121bfa39635b0a064e6a86293b899856d0e6f3f1d143aad7bf8b4b4f12c07d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2026-06-25T12:05:40Z",
    "title_canon_sha256": "c8d4e677a327c3167762920a061b754dff53df970df03f4ee1240d0c60e95903"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.26930",
    "kind": "arxiv",
    "version": 1
  }
}