Pith Number

pith:BVDLHUDX

pith:2012:BVDLHUDXD2OJEKQDLQPFXP4Q7K

not attested not anchored not stored refs pending

Improved approximation algorithms for low-density instances of the Minimum Entropy Set Cover Problem

Cosmin Bonchis, Gabriel Istrate

arxiv:1207.7134 v1 · 2012-07-30 · cs.DS · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BVDLHUDXD2OJEKQDLQPFXP4Q7K}

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	2026-05-18T03:49:46.667849Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0d46b3d0771e9c922a035c1e5bbf90fabdb6601d7ee4e1f557b14cf92d96cb47

Aliases

arxiv: 1207.7134 · arxiv_version: 1207.7134v1 · doi: 10.48550/arxiv.1207.7134 · pith_short_12: BVDLHUDXD2OJ · pith_short_16: BVDLHUDXD2OJEKQD · pith_short_8: BVDLHUDX

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/BVDLHUDXD2OJEKQDLQPFXP4Q7K \
  | 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: 0d46b3d0771e9c922a035c1e5bbf90fabdb6601d7ee4e1f557b14cf92d96cb47

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "946daa4fda2e1fedfc21a1e8c786890950026c85fc2c9c35bc8e5f2a48b32850",
    "cross_cats_sorted": [
      "cs.CC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2012-07-30T23:38:52Z",
    "title_canon_sha256": "cad761fc1dd15d1e7103eb82dddff8e9663dbca5ccaa559d15fb0c8d81af047c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.7134",
    "kind": "arxiv",
    "version": 1
  }
}