Pith Number

pith:ZTT6QYLN

pith:2018:ZTT6QYLN7HKK5O3KTUUZLKHRC2

not attested not anchored not stored refs pending

Structural Rounding: Approximation Algorithms for Graphs Near an Algorithmically Tractable Class

Ali Vakilian, Andrew van der Poel, Blair D. Sullivan, Brian Lavallee, Erik D. Demaine, Kyle Kloster, Quanquan C. Liu, Timothy D. Goodrich

arxiv:1806.02771 v3 · 2018-06-07 · cs.CC · cs.DS · 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{ZTT6QYLN7HKK5O3KTUUZLKHRC2}

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	2026-05-17T23:58:47.933765Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cce7e8616df9d4aebb6a9d2995a8f116b0ba69d07b4ce1a929d73cb789015668

Aliases

arxiv: 1806.02771 · arxiv_version: 1806.02771v3 · doi: 10.48550/arxiv.1806.02771 · pith_short_12: ZTT6QYLN7HKK · pith_short_16: ZTT6QYLN7HKK5O3K · pith_short_8: ZTT6QYLN

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/ZTT6QYLN7HKK5O3KTUUZLKHRC2 \
  | 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: cce7e8616df9d4aebb6a9d2995a8f116b0ba69d07b4ce1a929d73cb789015668

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "499eaac92d022561b09021172b293b7961b7726479dff7e2971c7dc9aa9f7b9b",
    "cross_cats_sorted": [
      "cs.DS",
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2018-06-07T16:39:17Z",
    "title_canon_sha256": "b8f63ae032d58580d95420ff96f82f5fe1923351359846fe28a7080f5c3d0fc7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.02771",
    "kind": "arxiv",
    "version": 3
  }
}