Pith Number

pith:62OHQ3SX

pith:2019:62OHQ3SXX66U3W6MYVGXOYJWQX

not attested not anchored not stored refs pending

An Exact Algorithm for Minimum Weight Vertex Cover Problem in Large Graphs

Bo Jin, Chu-Min Li, Junping Zhou, Luzhi Wang, Minghao Yin

arxiv:1903.05948 v1 · 2019-03-14 · cs.DS · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{62OHQ3SXX66U3W6MYVGXOYJWQX}

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	2026-05-17T23:51:15.739802Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f69c786e57bfbd4ddbccc54d77613685fecec97ffcd5c0c6c58402fa4fbdad48

Aliases

arxiv: 1903.05948 · arxiv_version: 1903.05948v1 · doi: 10.48550/arxiv.1903.05948 · pith_short_12: 62OHQ3SXX66U · pith_short_16: 62OHQ3SXX66U3W6M · pith_short_8: 62OHQ3SX

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/62OHQ3SXX66U3W6MYVGXOYJWQX \
  | 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: f69c786e57bfbd4ddbccc54d77613685fecec97ffcd5c0c6c58402fa4fbdad48

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fe051d75cd7155fd0956111357a43a8239be51610f48c7d3e74eab2cab26f5a9",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2019-03-14T12:44:55Z",
    "title_canon_sha256": "8cdad0dcd544810099fdade7f2083867929f7fed740b26359f3c6cd5a3e319aa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.05948",
    "kind": "arxiv",
    "version": 1
  }
}