Pith Number

pith:7FRJZXZX

pith:2018:7FRJZXZX7VGKH3IHUZPLWCUND2

not attested not anchored not stored refs pending

Large-deviation Properties of Linear-programming Computational Hardness of the Vertex Cover Problem

Alexander K. Hartmann, Koji Hukushima, Satoshi Takabe

arxiv:1802.02350 v1 · 2018-02-07 · cond-mat.dis-nn · cond-mat.stat-mech · 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{7FRJZXZX7VGKH3IHUZPLWCUND2}

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	2026-05-18T00:24:08.526470Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f9629cdf37fd4ca3ed07a65ebb0a8d1ebcd2f49b3dac05bbd2c0808100fc3dfd

Aliases

arxiv: 1802.02350 · arxiv_version: 1802.02350v1 · doi: 10.48550/arxiv.1802.02350 · pith_short_12: 7FRJZXZX7VGK · pith_short_16: 7FRJZXZX7VGKH3IH · pith_short_8: 7FRJZXZX

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/7FRJZXZX7VGKH3IHUZPLWCUND2 \
  | 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: f9629cdf37fd4ca3ed07a65ebb0a8d1ebcd2f49b3dac05bbd2c0808100fc3dfd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5647977a6c65483abba6d4905e2415f115c1248bf26376a6af11598410bbb0ca",
    "cross_cats_sorted": [
      "cond-mat.stat-mech",
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.dis-nn",
    "submitted_at": "2018-02-07T08:34:28Z",
    "title_canon_sha256": "521064eb336bd5859fed62ae2d43b40740750f22a05cc67251723b2c471f945e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.02350",
    "kind": "arxiv",
    "version": 1
  }
}