Pith Number

pith:42LVLGBD

pith:2025:42LVLGBDMLRCTVE2ZMD5TLM5CH

not attested not anchored not stored refs pending

HAPI: A Model for Learning Robot Facial Expressions from Human Preferences

Chaoran Liu, Dongsheng Yang, Qianying Liu, Shin'ya Nishida, Takashi Minato, Wataru Sato

arxiv:2503.17046 v2 · 2025-03-21 · cs.RO · cs.AI · cs.CV · cs.HC · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{42LVLGBDMLRCTVE2ZMD5TLM5CH}

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	2026-07-05T11:31:27.223496Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e69755982362e229d49acb07d9ad9d11c518557ea77e5e9108153be80d98ff7d

Aliases

arxiv: 2503.17046 · arxiv_version: 2503.17046v2 · doi: 10.48550/arxiv.2503.17046 · pith_short_12: 42LVLGBDMLRC · pith_short_16: 42LVLGBDMLRCTVE2 · pith_short_8: 42LVLGBD

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/42LVLGBDMLRCTVE2ZMD5TLM5CH \
  | 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: e69755982362e229d49acb07d9ad9d11c518557ea77e5e9108153be80d98ff7d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aea385936e548b3cf5477ce202a3adab8b6c1c6bc45b9fd8ed98f3490fa4daee",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.CV",
      "cs.HC",
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.RO",
    "submitted_at": "2025-03-21T11:04:01Z",
    "title_canon_sha256": "7479672fcd6a340fbf21b37c5c53c760b3ccc38053a58cf6e1e5b20bc95c9f8c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2503.17046",
    "kind": "arxiv",
    "version": 2
  }
}