Pith Number

pith:7BH7OWWF

pith:2012:7BH7OWWFHT6NR5QV7OWBPM4SEL

not attested not anchored not stored refs pending

Approximability of the Vertex Cover Problem in Power Law Graphs

Mathias Hauptmann, Mikael Gast

arxiv:1204.0982 v2 · 2012-04-04 · cs.DS · cs.SI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7BH7OWWFHT6NR5QV7OWBPM4SEL}

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	2026-05-18T03:58:36.503895Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f84ff75ac53cfcd8f615fbac17b39222cfc65daee40c62fa1461353c50506046

Aliases

arxiv: 1204.0982 · arxiv_version: 1204.0982v2 · doi: 10.48550/arxiv.1204.0982 · pith_short_12: 7BH7OWWFHT6N · pith_short_16: 7BH7OWWFHT6NR5QV · pith_short_8: 7BH7OWWF

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/7BH7OWWFHT6NR5QV7OWBPM4SEL \
  | 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: f84ff75ac53cfcd8f615fbac17b39222cfc65daee40c62fa1461353c50506046

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1bbcee982f33bc5035bb2991b4319ad3517ed00022b26619531fa642f7f1febe",
    "cross_cats_sorted": [
      "cs.SI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2012-04-04T16:16:37Z",
    "title_canon_sha256": "05852745669196c49cb16d5df990170cd5113329d945701680f12aaaf99feefb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.0982",
    "kind": "arxiv",
    "version": 2
  }
}