Pith Number

pith:BMRBW7PB

pith:2026:BMRBW7PBY4YLVEGDFQRKEGFCH2

not attested not anchored not stored refs pending

GP-Tree: An in-memory spatial index combining adaptive grid cells with a prefix tree for efficient spatial querying

Huayi Wu, Jiayao Wang, Lanxue Dang, Qingyang Xu, Xiangyang Yang, Xuefeng Guan, Yi Xie

arxiv:2603.07517 v2 · 2026-03-08 · cs.DB · cs.IR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BMRBW7PBY4YLVEGDFQRKEGFCH2}

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	2026-06-23T02:13:22.149887Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0b221b7de1c730ba90c32c22a218a23e97e04e61c45005a7f96c8517105de4a2

Aliases

arxiv: 2603.07517 · arxiv_version: 2603.07517v2 · doi: 10.48550/arxiv.2603.07517 · pith_short_12: BMRBW7PBY4YL · pith_short_16: BMRBW7PBY4YLVEGD · pith_short_8: BMRBW7PB

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/BMRBW7PBY4YLVEGDFQRKEGFCH2 \
  | 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: 0b221b7de1c730ba90c32c22a218a23e97e04e61c45005a7f96c8517105de4a2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b061de0577a19d5ce3d5b956142fded7695e37baded043d3da59f5c0dd2b8935",
    "cross_cats_sorted": [
      "cs.IR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DB",
    "submitted_at": "2026-03-08T07:59:03Z",
    "title_canon_sha256": "e9e987046c213a65002e99eb4c580562dc8a45327eb01b369a4df10ed6dca44d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2603.07517",
    "kind": "arxiv",
    "version": 2
  }
}