Pith Number

pith:DFCENPOL

pith:2015:DFCENPOL5JBPKOO55MOJKCWRUE

not attested not anchored not stored refs pending

Approximation algorithms for the two-center problem of convex polygon

Anil Maheswari, Sanjib Sadhu, Sasanka Roy, Soumen Nandi, Subhas C. Nandy

arxiv:1512.02356 v1 · 2015-12-08 · 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{DFCENPOL5JBPKOO55MOJKCWRUE}

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	2026-05-18T01:24:44.844772Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

194446bdcbea42f539ddeb1c950ad1a122fa659078245aa1e3a60facf584e81c

Aliases

arxiv: 1512.02356 · arxiv_version: 1512.02356v1 · doi: 10.48550/arxiv.1512.02356 · pith_short_12: DFCENPOL5JBP · pith_short_16: DFCENPOL5JBPKOO5 · pith_short_8: DFCENPOL

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/DFCENPOL5JBPKOO55MOJKCWRUE \
  | 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: 194446bdcbea42f539ddeb1c950ad1a122fa659078245aa1e3a60facf584e81c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "37e0cb9be8fd43da189af852d9fd51db6acc087ff87762a4a15ca98b46affffd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2015-12-08T07:15:56Z",
    "title_canon_sha256": "e091718b107bfebe9903579e2bbb0e85b29861005f94c03058557ae4f0a303f3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.02356",
    "kind": "arxiv",
    "version": 1
  }
}