Pith Number

pith:LJMQLVPZ

pith:2021:LJMQLVPZKTGT5LKK5HOWTJV4VX

not attested not anchored not stored refs pending

A new near-linear time algorithm for k-nearest neighbor search using a compressed cover tree

Vitaliy Kurlin, Yury Elkin

arxiv:2111.15478 v5 · 2021-11-30 · cs.CG · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LJMQLVPZKTGT5LKK5HOWTJV4VX}

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.

Cited by

1 paper in Pith

Parallel Metric Skiplists and Nearest Neighbor Search

Receipt and verification

First computed	2026-07-05T07:51:23.329346Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5a5905d5f954cd3ead4ae9dd69a6bcadfd17b76b3f5c0d604e68cccbdd9afbe0

Aliases

arxiv: 2111.15478 · arxiv_version: 2111.15478v5 · doi: 10.48550/arxiv.2111.15478 · pith_short_12: LJMQLVPZKTGT · pith_short_16: LJMQLVPZKTGT5LKK · pith_short_8: LJMQLVPZ

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/LJMQLVPZKTGT5LKK5HOWTJV4VX \
  | 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: 5a5905d5f954cd3ead4ae9dd69a6bcadfd17b76b3f5c0d604e68cccbdd9afbe0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "172cf6bba29af0f068e669cd65ef74338ace70b4e671159d7ef3900f01b20706",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2021-11-30T15:14:07Z",
    "title_canon_sha256": "61f536d8448fbad3c5d514095b15d7af039fdc97e3458a304585b28fc756f9bc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2111.15478",
    "kind": "arxiv",
    "version": 5
  }
}