Pith Number

pith:4IVC7KIF

pith:2014:4IVC7KIFGNMSHU6AGRPYFWIRHU

not attested not anchored not stored refs pending

A Polynomial-time Algorithm for Outerplanar Diameter Improvement

Christophe Paul, Daniel Gon\c{c}alves, Dimitrios M. Thilikos, Eun Jung Kim, Ignasi Sau, Mathias Weller, Nathann Cohen

arxiv:1403.5702 v3 · 2014-03-22 · cs.DS · cs.DM · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4IVC7KIFGNMSHU6AGRPYFWIRHU}

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	2026-05-18T02:51:14.721391Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e22a2fa905335923d3c0345f82d9113d13719390a63143779f88d585bea3ede1

Aliases

arxiv: 1403.5702 · arxiv_version: 1403.5702v3 · doi: 10.48550/arxiv.1403.5702 · pith_short_12: 4IVC7KIFGNMS · pith_short_16: 4IVC7KIFGNMSHU6A · pith_short_8: 4IVC7KIF

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/4IVC7KIFGNMSHU6AGRPYFWIRHU \
  | 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: e22a2fa905335923d3c0345f82d9113d13719390a63143779f88d585bea3ede1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "873fff34c53bb67a9812a212dcd7fd5a7d785fd24dd8e51628fe46fa9271237e",
    "cross_cats_sorted": [
      "cs.DM",
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2014-03-22T21:01:37Z",
    "title_canon_sha256": "7e35d312aaa6401df403e2adea226ff18bc3b4a6b42c97df3ba32e9a1294ab3e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1403.5702",
    "kind": "arxiv",
    "version": 3
  }
}