Pith Number

pith:TS6FCM7N

pith:2018:TS6FCM7NJ3L4DRYVE4LOPHPHXK

not attested not anchored not stored refs pending

Improved approximation algorithms for path vertex covers in regular graphs

An Zhang, Guohui Lin, Yong Chen, Zhi-Zhong Chen

arxiv:1811.01162 v1 · 2018-11-03 · 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{TS6FCM7NJ3L4DRYVE4LOPHPHXK}

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	2026-05-18T00:01:35.179457Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9cbc5133ed4ed7c1c7152716e79de7ba91aa67a61262bf3b2d36502be2de2c85

Aliases

arxiv: 1811.01162 · arxiv_version: 1811.01162v1 · doi: 10.48550/arxiv.1811.01162 · pith_short_12: TS6FCM7NJ3L4 · pith_short_16: TS6FCM7NJ3L4DRYV · pith_short_8: TS6FCM7N

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/TS6FCM7NJ3L4DRYVE4LOPHPHXK \
  | 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: 9cbc5133ed4ed7c1c7152716e79de7ba91aa67a61262bf3b2d36502be2de2c85

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "22949e0a31041aa1dc25a838ac0de8bf89d167a4e3ee169003db8afee0d82484",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2018-11-03T05:05:51Z",
    "title_canon_sha256": "bda9baa1c4c5e15de10ee9828f98827052185f5d63b382d2479308deca2d6961"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.01162",
    "kind": "arxiv",
    "version": 1
  }
}