Pith Number

pith:BQ4D52GV

pith:2009:BQ4D52GVNLF6WTZP4FFVOVMLYO

not attested not anchored not stored refs pending

Improved Approximation Algorithms for Segment Minimization in Intensity Modulated Radiation Therapy

Holger H. Hoos, Jared Saia, Maxwell Young, Shuang Luan, Stephane Durocher, Therese Biedl

arxiv:0905.4930 v2 · 2009-05-29 · 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{BQ4D52GVNLF6WTZP4FFVOVMLYO}

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	2026-05-18T04:12:21.384969Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0c383ee8d56acbeb4f2fe14b57558bc3b8b0b15023dc68d56d332a01a7e58622

Aliases

arxiv: 0905.4930 · arxiv_version: 0905.4930v2 · doi: 10.48550/arxiv.0905.4930 · pith_short_12: BQ4D52GVNLF6 · pith_short_16: BQ4D52GVNLF6WTZP · pith_short_8: BQ4D52GV

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/BQ4D52GVNLF6WTZP4FFVOVMLYO \
  | 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: 0c383ee8d56acbeb4f2fe14b57558bc3b8b0b15023dc68d56d332a01a7e58622

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3be8813c168142b44ee8838651e059867dc150d405c50e387d99258b87c6cd82",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2009-05-29T17:56:06Z",
    "title_canon_sha256": "8eb7792a30a5565ba41ca7f3c36b88a0fa74789f402e974d9814aad35ae88aa6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0905.4930",
    "kind": "arxiv",
    "version": 2
  }
}