Pith Number

pith:JR4L2TCO

pith:2015:JR4L2TCOOTOIOMRRRJEV4D7567

not attested not anchored not stored refs pending

Cubic TSP - a 1.3-approximation

Barbora Candr\'akov\'a, Robert Luko\v{t}ka

arxiv:1506.06369 v2 · 2015-06-21 · cs.DM · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JR4L2TCOOTOIOMRRRJEV4D7567}

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	2026-05-18T01:02:31.092095Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4c78bd4c4e74dc8732318a495e0ffdf7fa2981788869bef739506a87ff72413d

Aliases

arxiv: 1506.06369 · arxiv_version: 1506.06369v2 · doi: 10.48550/arxiv.1506.06369 · pith_short_12: JR4L2TCOOTOI · pith_short_16: JR4L2TCOOTOIOMRR · pith_short_8: JR4L2TCO

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/JR4L2TCOOTOIOMRRRJEV4D7567 \
  | 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: 4c78bd4c4e74dc8732318a495e0ffdf7fa2981788869bef739506a87ff72413d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a9d899e0a4e0c2af65b6dc3f0c7eeacd1e6ee5978feb1202c163487263d8c010",
    "cross_cats_sorted": [
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2015-06-21T14:15:57Z",
    "title_canon_sha256": "b0d546aea5916ec458749c400bc44cdb4abe64fe77d5788ad9849d5e37c900a0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.06369",
    "kind": "arxiv",
    "version": 2
  }
}