Pith Number

pith:6FESEJI3

pith:2007:6FESEJI3EIKN6PTPKMC4V5NMIB

not attested not anchored not stored refs pending

Approximation Algorithms for the Highway Problem under the Coupon Model

Kouhei Tomita, Ryoso Hamane, Toshiya Itoh

arxiv:0712.2629 v2 · 2007-12-17 · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6FESEJI3EIKN6PTPKMC4V5NMIB}

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	2026-05-18T04:12:10.805845Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f14922251b2214df3e6f5305caf5ac4043842c58c05be8b64cdd94c785897b90

Aliases

arxiv: 0712.2629 · arxiv_version: 0712.2629v2 · doi: 10.48550/arxiv.0712.2629 · pith_short_12: 6FESEJI3EIKN · pith_short_16: 6FESEJI3EIKN6PTP · pith_short_8: 6FESEJI3

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/6FESEJI3EIKN6PTPKMC4V5NMIB \
  | 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: f14922251b2214df3e6f5305caf5ac4043842c58c05be8b64cdd94c785897b90

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e63d14aeccf0e6ad3dedee7df8b67c816f1341dacfdaa49b9a56bb8b45b19301",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "cs.DS",
    "submitted_at": "2007-12-17T04:47:38Z",
    "title_canon_sha256": "4c5add5f4e46c2447bfe6b2bf71e78d7ce301410d4051520ce910447546f6dd4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0712.2629",
    "kind": "arxiv",
    "version": 2
  }
}