Pith Number

pith:NJAZ5WJD

pith:2014:NJAZ5WJDIYFUZ37YC6MCHRZC2N

not attested not anchored not stored refs pending

An improved approximation algorithm for k-median problem using a new factor-revealing LP

Chenchen Wu, Dachuan Xu, Donglei Du, Yishui Wang

arxiv:1410.4161 v2 · 2014-10-15 · 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{NJAZ5WJDIYFUZ37YC6MCHRZC2N}

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	2026-05-18T01:32:30.646401Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6a419ed923460b4ceff8179823c722d36a74ee34dbd724d5986ef90d86245f6a

Aliases

arxiv: 1410.4161 · arxiv_version: 1410.4161v2 · doi: 10.48550/arxiv.1410.4161 · pith_short_12: NJAZ5WJDIYFU · pith_short_16: NJAZ5WJDIYFUZ37Y · pith_short_8: NJAZ5WJD

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/NJAZ5WJDIYFUZ37YC6MCHRZC2N \
  | 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: 6a419ed923460b4ceff8179823c722d36a74ee34dbd724d5986ef90d86245f6a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3f2f08d110482feea8a8acbd2f7cca1a7f663fd336bb6b205df8caf5ffdc6bc2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2014-10-15T18:41:14Z",
    "title_canon_sha256": "52213957e283b93dd82d833d3b5985e2e6410b431a6636638db6fb65fa6547ee"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1410.4161",
    "kind": "arxiv",
    "version": 2
  }
}