Pith Number

pith:IG7ANDQE

pith:2013:IG7ANDQE7PYES722BBGMQGBDCV

not attested not anchored not stored refs pending

The Price of Connectivity for Vertex Cover

Eglantine Camby, Jean Cardinal, Oliver Schaudt, Samuel Fiorini

arxiv:1303.2478 v2 · 2013-03-11 · cs.DM · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{IG7ANDQE7PYES722BBGMQGBDCV}

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	2026-05-18T03:25:43.296850Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

41be068e04fbf0497f5a084cc81823156ab9ab1a33da501293448a3fb2518d60

Aliases

arxiv: 1303.2478 · arxiv_version: 1303.2478v2 · doi: 10.48550/arxiv.1303.2478 · pith_short_12: IG7ANDQE7PYE · pith_short_16: IG7ANDQE7PYES722 · pith_short_8: IG7ANDQE

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/IG7ANDQE7PYES722BBGMQGBDCV \
  | 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: 41be068e04fbf0497f5a084cc81823156ab9ab1a33da501293448a3fb2518d60

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2b42e781b28cd92240d70b10cb07a64a7c4a2b58057d797b9e6cda6e61c526cc",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2013-03-11T10:35:51Z",
    "title_canon_sha256": "2193cc74bdd2bc343d45a937038ba7b33c4939e131706d047ae8d899b128aca5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.2478",
    "kind": "arxiv",
    "version": 2
  }
}