Pith Number

pith:JWJJJHOW

pith:2017:JWJJJHOWSUC2BSRER3NTH5DAMG

not attested not anchored not stored refs pending

An $O(n\log n)$-Time Algorithm for the k-Center Problem in Trees

Haitao Wang, Jingru Zhang

arxiv:1705.02752 v2 · 2017-05-08 · cs.DS · cs.CG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JWJJJHOWSUC2BSRER3NTH5DAMG}

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	2026-05-18T00:21:55.025474Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4d92949dd69505a0ca248edb33f460619e89e11eee94939d98c1eec57e141402

Aliases

arxiv: 1705.02752 · arxiv_version: 1705.02752v2 · doi: 10.48550/arxiv.1705.02752 · pith_short_12: JWJJJHOWSUC2 · pith_short_16: JWJJJHOWSUC2BSRE · pith_short_8: JWJJJHOW

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/JWJJJHOWSUC2BSRER3NTH5DAMG \
  | 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: 4d92949dd69505a0ca248edb33f460619e89e11eee94939d98c1eec57e141402

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7637dde1b89647199e3fc3bc24a8d90a95d5c66f9cd8fc236cb4dd87f8f220e9",
    "cross_cats_sorted": [
      "cs.CG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2017-05-08T05:58:07Z",
    "title_canon_sha256": "8d665173a011c9a87bfe0e18be2ea8a2f5da5011fe9975bf9af74c75165e4ff2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1705.02752",
    "kind": "arxiv",
    "version": 2
  }
}