Pith Number

pith:BJ6VZDAU

pith:2014:BJ6VZDAUXUSOFN6REQA5YORFNO

not attested not anchored not stored refs pending

Statistical physics of hard combinatorial optimization: The vertex cover problem

Hai-Jun Zhou, Jin-Hua Zhao

arxiv:1404.6049 v1 · 2014-04-24 · cond-mat.dis-nn · 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{BJ6VZDAUXUSOFN6REQA5YORFNO}

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	2026-05-18T02:49:45.480699Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0a7d5c8c14bd24e2b7d12401dc3a256ba0a7ae9fecea1602758be6acfc11f3e2

Aliases

arxiv: 1404.6049 · arxiv_version: 1404.6049v1 · doi: 10.48550/arxiv.1404.6049 · pith_short_12: BJ6VZDAUXUSO · pith_short_16: BJ6VZDAUXUSOFN6R · pith_short_8: BJ6VZDAU

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/BJ6VZDAUXUSOFN6REQA5YORFNO \
  | 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: 0a7d5c8c14bd24e2b7d12401dc3a256ba0a7ae9fecea1602758be6acfc11f3e2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0f2f1a8e9867da3c6f20fddf55bd403e37b8da697a3de44fb691fcebef4fc7fb",
    "cross_cats_sorted": [
      "cs.CC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.dis-nn",
    "submitted_at": "2014-04-24T08:10:22Z",
    "title_canon_sha256": "dd08e2e7aae862dcce6970ec10840209c7ee1c5c5403bb77e40e6075165b4c6b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.6049",
    "kind": "arxiv",
    "version": 1
  }
}