Pith Number

pith:RXO3IPSO

pith:2012:RXO3IPSOPYVQ53TSQYOCNBLPFD

not attested not anchored not stored refs pending

No Sublogarithmic-time Approximation Scheme for Bipartite Vertex Cover

Jukka Suomela, Mika G\"o\"os

arxiv:1205.4605 v1 · 2012-05-21 · cs.DC · cs.CC · 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{RXO3IPSOPYVQ53TSQYOCNBLPFD}

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	2026-05-18T03:04:06.864764Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8dddb43e4e7e2b0eee72861c26856f28ea635ec04ba2a7d077d8285a34ac0b2f

Aliases

arxiv: 1205.4605 · arxiv_version: 1205.4605v1 · doi: 10.48550/arxiv.1205.4605 · pith_short_12: RXO3IPSOPYVQ · pith_short_16: RXO3IPSOPYVQ53TS · pith_short_8: RXO3IPSO

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/RXO3IPSOPYVQ53TSQYOCNBLPFD \
  | 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: 8dddb43e4e7e2b0eee72861c26856f28ea635ec04ba2a7d077d8285a34ac0b2f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d3bbc7746f24a1aa0251eea2fcbaa06ab5e14f04a10a50a1991994214a23b9e6",
    "cross_cats_sorted": [
      "cs.CC",
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DC",
    "submitted_at": "2012-05-21T14:07:00Z",
    "title_canon_sha256": "1abe5a4a0ac370fcbe8704058b0130e91eea2146b527799539a8b03b99874aaa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.4605",
    "kind": "arxiv",
    "version": 1
  }
}