Pith Number

pith:KNP5QAMW

pith:2016:KNP5QAMWVSWLCKYCZCDRQOMYUY

not attested not anchored not stored refs pending

A fast algorithm for identifying Friends-of-Friends halos

Chirag Modi, Yu Feng

arxiv:1607.03224 v2 · 2016-07-12 · astro-ph.IM · 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{KNP5QAMWVSWLCKYCZCDRQOMYUY}

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	2026-05-18T00:43:18.470028Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

535fd80196acacb12b02c887183998a627cd1c3033c23800ae0206fd0d05830b

Aliases

arxiv: 1607.03224 · arxiv_version: 1607.03224v2 · doi: 10.48550/arxiv.1607.03224 · pith_short_12: KNP5QAMWVSWL · pith_short_16: KNP5QAMWVSWLCKYC · pith_short_8: KNP5QAMW

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/KNP5QAMWVSWLCKYCZCDRQOMYUY \
  | 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: 535fd80196acacb12b02c887183998a627cd1c3033c23800ae0206fd0d05830b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "33148c280e0162da5c79625d1635841ce086d12169814f804b1c69920907058d",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2016-07-12T03:24:53Z",
    "title_canon_sha256": "ae96aaa8f86aa0762fb4b5cf4e9952ea5959a3edaef13dfa9db9c55cd4f5cbe2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1607.03224",
    "kind": "arxiv",
    "version": 2
  }
}