Pith Number

pith:PLU52LOG

pith:2012:PLU52LOG5VRB2GP74V6E7HF2XS

not attested not anchored not stored refs pending

Choose Outsiders First: a mean 2-approximation random algorithm for covering problems

Etienne Birmel\'e

arxiv:1208.5907 v2 · 2012-08-29 · 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{PLU52LOG5VRB2GP74V6E7HF2XS}

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	2026-05-18T03:25:59.331545Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7ae9dd2dc6ed621d19ffe57c4f9cbabcb701d63b0325ff67ac5bc36dd748a46d

Aliases

arxiv: 1208.5907 · arxiv_version: 1208.5907v2 · doi: 10.48550/arxiv.1208.5907 · pith_short_12: PLU52LOG5VRB · pith_short_16: PLU52LOG5VRB2GP7 · pith_short_8: PLU52LOG

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/PLU52LOG5VRB2GP74V6E7HF2XS \
  | 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: 7ae9dd2dc6ed621d19ffe57c4f9cbabcb701d63b0325ff67ac5bc36dd748a46d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4406b4893b2a6b1ad76a7cf0486a0f6b7aca0ade097ccb9aa429379b3736c250",
    "cross_cats_sorted": [
      "cs.CC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2012-08-29T13:16:40Z",
    "title_canon_sha256": "5d0464a6bb12aead0a51c94acc6edcc9cd60f86e243d6d2869f3ca055d16fe7c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.5907",
    "kind": "arxiv",
    "version": 2
  }
}