Pith Number

pith:WJFSM7ZN

pith:2018:WJFSM7ZNHFKIPDJN7PV4IRJGMR

not attested not anchored not stored refs pending

An Approximation Algorithm for Active Friending in Online Social Networks

Ding-Zhu Du, Guangmo Tong, Ruiqi Wang, Weili Wu, Xiang Li

arxiv:1811.00643 v3 · 2018-11-01 · cs.SI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WJFSM7ZNHFKIPDJN7PV4IRJGMR}

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	2026-05-17T23:54:39.088905Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b24b267f2d3954878d2dfbebc445266461f1b57e7567631d4776c6063d13e459

Aliases

arxiv: 1811.00643 · arxiv_version: 1811.00643v3 · doi: 10.48550/arxiv.1811.00643 · pith_short_12: WJFSM7ZNHFKI · pith_short_16: WJFSM7ZNHFKIPDJN · pith_short_8: WJFSM7ZN

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/WJFSM7ZNHFKIPDJN7PV4IRJGMR \
  | 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: b24b267f2d3954878d2dfbebc445266461f1b57e7567631d4776c6063d13e459

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f7aa11302c5104799913130fd506de8d536297ec9c156e3d78895752a098233d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SI",
    "submitted_at": "2018-11-01T21:39:48Z",
    "title_canon_sha256": "4cea31b0c2917d58570f5b16cd6ef74c331d246b23d4a5b970e727091f77239d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.00643",
    "kind": "arxiv",
    "version": 3
  }
}