Pith Number

pith:NXQOCXMR

pith:2007:NXQOCXMRF6M7DW52OHDHXEHAI4

not attested not anchored not stored refs pending

A Tighter Analysis of Setcover Greedy Algorithm for Test Set

Peng Cui

arxiv:0705.1750 v6 · 2007-05-12 · 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{NXQOCXMRF6M7DW52OHDHXEHAI4}

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	2026-05-18T04:27:25.844660Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6de0e15d912f99f1dbba71c67b90e0472d2047d9aa954ebb42a52e350cc97952

Aliases

arxiv: 0705.1750 · arxiv_version: 0705.1750v6 · doi: 10.48550/arxiv.0705.1750 · pith_short_12: NXQOCXMRF6M7 · pith_short_16: NXQOCXMRF6M7DW52 · pith_short_8: NXQOCXMR

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/NXQOCXMRF6M7DW52OHDHXEHAI4 \
  | 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: 6de0e15d912f99f1dbba71c67b90e0472d2047d9aa954ebb42a52e350cc97952

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ec21d58e6d94f51b5e19fd825a2bb4b429190a91bcab1b8f47f54b755949a269",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2007-05-12T04:18:36Z",
    "title_canon_sha256": "094b8b81214a857785e97cfd2958b906e5ff6222ad65b9ab03ddbd9f190ef9de"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0705.1750",
    "kind": "arxiv",
    "version": 6
  }
}