Pith Number

pith:NLXRY5LU

pith:2018:NLXRY5LUTOTRZ725YGEF4KKIRE

not attested not anchored not stored refs pending

Covering Tours and Cycle Covers with Turn Costs: Hardness and Approximation

Dominik Krupke, S\'andor P. Fekete

arxiv:1808.04417 v2 · 2018-08-13 · 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{NLXRY5LUTOTRZ725YGEF4KKIRE}

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	2026-05-17T23:47:48.811407Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6aef1c75749ba71cff5dc1885e2948891f5b889aeaf5bfd58bcffc50327ac197

Aliases

arxiv: 1808.04417 · arxiv_version: 1808.04417v2 · doi: 10.48550/arxiv.1808.04417 · pith_short_12: NLXRY5LUTOTR · pith_short_16: NLXRY5LUTOTRZ725 · pith_short_8: NLXRY5LU

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/NLXRY5LUTOTRZ725YGEF4KKIRE \
  | 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: 6aef1c75749ba71cff5dc1885e2948891f5b889aeaf5bfd58bcffc50327ac197

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a807442a288278874fe478742c3b612356da05725b54fcc46d3de1a2cc11e858",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2018-08-13T19:38:21Z",
    "title_canon_sha256": "3690d2c1bf3d8dda68e497515bc52a30751472346a3e13d68837d9386f15a1da"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.04417",
    "kind": "arxiv",
    "version": 2
  }
}