Pith Number

pith:7LNV4V7U

pith:2025:7LNV4V7UQONARXQOD3R3QMSPS5

not attested not anchored not stored refs pending

Why Do MLLMs Struggle with Spatial Understanding? A Systematic Analysis from Data to Architecture

Helu Zhi, Jiajun Zhang, Jingjing Huang, Shuo Ren, Wang Xu, Wanyue Zhang, Yangbin Xu, Yibin Huang

arxiv:2509.02359 v1 · 2025-09-02 · 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{7LNV4V7UQONARXQOD3R3QMSPS5}

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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.

Cited by

7 papers in Pith

SSMNBench: Diagnosing Image-based Cross-View Human-Object Understanding via Single-View Sufficiency and Multi-View Necessity

SVoT: State-aware Visualization-of-Thought for Spatial Reasoning via Reinforcement Learning

MPDocBench-Parse: Benchmarking Practical Multi-page Document Parsing

Why Far Looks Up: Probing Spatial Representation in Vision-Language Models

MPDocBench-Parse: Benchmarking Practical Multi-page Document Parsing

Receipt and verification

First computed	2026-07-05T12:03:37.071820Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fadb5e57f4839a08de0e1ee3b8324f97705273a566a941d20cc988764a278ac8

Aliases

arxiv: 2509.02359 · arxiv_version: 2509.02359v1 · doi: 10.48550/arxiv.2509.02359 · pith_short_12: 7LNV4V7UQONA · pith_short_16: 7LNV4V7UQONARXQO · pith_short_8: 7LNV4V7U

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/7LNV4V7UQONARXQOD3R3QMSPS5 \
  | 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: fadb5e57f4839a08de0e1ee3b8324f97705273a566a941d20cc988764a278ac8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7f98d856c70ab3c6eac08edd50af1022dda7506160d5cfedf3a0c3f66a0d3b2b",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2025-09-02T14:22:43Z",
    "title_canon_sha256": "5d7a7f2c79b0ab49d583ca5fd227249dc25cd9a1225873b8ede3c7e28851a9fe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2509.02359",
    "kind": "arxiv",
    "version": 1
  }
}