Pith Number

pith:4JYVJR2O

pith:2026:4JYVJR2ORS3C2R2QWCESVGVAC4

not attested not anchored not stored refs pending

QSTRBench: a New Benchmark to Evaluate the Ability of Language Models to Reason with Qualitative Spatial and Temporal Calculi

Anthony G. Cohn, Robert E. Blackwell

arxiv:2605.18380 v1 · 2026-05-18 · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4JYVJR2ORS3C2R2QWCESVGVAC4}

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	2026-05-20T00:05:58.007572Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e27154c74e8cb62d4750b0892a9aa0170a9af4c677bfe2d7bfd0538d15b01882

Aliases

arxiv: 2605.18380 · arxiv_version: 2605.18380v1 · doi: 10.48550/arxiv.2605.18380 · pith_short_12: 4JYVJR2ORS3C · pith_short_16: 4JYVJR2ORS3C2R2Q · pith_short_8: 4JYVJR2O

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/4JYVJR2ORS3C2R2QWCESVGVAC4 \
  | 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: e27154c74e8cb62d4750b0892a9aa0170a9af4c677bfe2d7bfd0538d15b01882

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5e83de5b5b66d17f3c9d1f267dbbd9546f467e77ce702cf3dab722de29baaa1e",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2026-05-18T13:26:14Z",
    "title_canon_sha256": "8b426f8841baf91aa977ff474d66808ae6a81a34729df3beaab8c328db010246"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.18380",
    "kind": "arxiv",
    "version": 1
  }
}