Pith Number

pith:L3QDQ6AU

pith:2026:L3QDQ6AUCDD5JICIUB2XZW46TT

not attested not anchored not stored refs pending

SpatialAct: Probing Spatial Reasoning-to-Action Capabilities of VLM Agents in 3D Scenes

Hangyu Fan, Jie Feng, Pan Hui, Shengyuan Wang, Tianhui Liu, Yanxin Xi, Yiming Guo, Yong Li, Zhiheng Zheng

arxiv:2605.31148 v1 · 2026-05-29 · cs.CV · cs.AI · 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{L3QDQ6AUCDD5JICIUB2XZW46TT}

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	2026-06-01T01:04:01.214381Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5ee038781410c7d4a048a0757cdb9e9cfdfc65bd2296021cb91bc475a947e49c

Aliases

arxiv: 2605.31148 · arxiv_version: 2605.31148v1 · doi: 10.48550/arxiv.2605.31148 · pith_short_12: L3QDQ6AUCDD5 · pith_short_16: L3QDQ6AUCDD5JICI · pith_short_8: L3QDQ6AU

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/L3QDQ6AUCDD5JICIUB2XZW46TT \
  | 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: 5ee038781410c7d4a048a0757cdb9e9cfdfc65bd2296021cb91bc475a947e49c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3feee843539edbca647feec1a0934040ff4677a8de64f836e63f80ee72161890",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.CL"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2026-05-29T10:59:26Z",
    "title_canon_sha256": "c6c255123cb5fb70e4128ff1d8460a1fdc56f305b76e64022d5f6ab08e8a49f2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.31148",
    "kind": "arxiv",
    "version": 1
  }
}