Pith Number

pith:G6S2JFPC

pith:2008:G6S2JFPCQ7635R3OMKFK46UT6W

not attested not anchored not stored refs pending

Drawing (Complete) Binary Tanglegrams: Hardness, Approximation, Fixed-Parameter Tractability

Alexander Wolff, Jaroslaw Byrka, Kevin Buchin, Maike Buchin, Martin N\"ollenburg, Rodrigo I. Silveira, Yoshio Okamoto

arxiv:0806.0920 v3 · 2008-06-05 · cs.CG · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{G6S2JFPCQ7635R3OMKFK46UT6W}

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	2026-05-18T04:40:54.806773Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

37a5a495e287fdbec76e628aae7a93f5acde6485f4374fb27719a5df3a74387c

Aliases

arxiv: 0806.0920 · arxiv_version: 0806.0920v3 · doi: 10.48550/arxiv.0806.0920 · pith_short_12: G6S2JFPCQ763 · pith_short_16: G6S2JFPCQ7635R3O · pith_short_8: G6S2JFPC

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/G6S2JFPCQ7635R3OMKFK46UT6W \
  | 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: 37a5a495e287fdbec76e628aae7a93f5acde6485f4374fb27719a5df3a74387c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "df3e0a6604b3e432c774ecc2fd3da28dcb49098b21be2cfb78ab404dfae25ae5",
    "cross_cats_sorted": [
      "cs.CC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2008-06-05T09:31:57Z",
    "title_canon_sha256": "c32ed5b7db9f16aba1d35d173413d1adeb367aadef86adfc2f7df73a6fa1cfa3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0806.0920",
    "kind": "arxiv",
    "version": 3
  }
}