Pith Number

pith:X6O5CHFA

pith:2018:X6O5CHFAV2QOUXOWBRHSYMDXG7

not attested not anchored not stored refs pending

Designing Practical PTASes for Minimum Feedback Vertex Set in Planar Graphs

Baigong Zheng, Glencora Borradaile, Hung Le

arxiv:1804.07869 v1 · 2018-04-21 · 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{X6O5CHFAV2QOUXOWBRHSYMDXG7}

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	2026-05-18T00:17:52.536366Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bf9dd11ca0aea0ea5dd60c4f2c307737c166bdf3e81de6f80a1212c886a8354a

Aliases

arxiv: 1804.07869 · arxiv_version: 1804.07869v1 · doi: 10.48550/arxiv.1804.07869 · pith_short_12: X6O5CHFAV2QO · pith_short_16: X6O5CHFAV2QOUXOW · pith_short_8: X6O5CHFA

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/X6O5CHFAV2QOUXOWBRHSYMDXG7 \
  | 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: bf9dd11ca0aea0ea5dd60c4f2c307737c166bdf3e81de6f80a1212c886a8354a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e0fcfe7a414f899c81671db1d8283dc782b5bb6c1d3307421996a694c96efd29",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2018-04-21T00:27:28Z",
    "title_canon_sha256": "8adc33f9dba332c6c772f13a970e5727fcbea99de692c3f38c22143b86fb95e2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.07869",
    "kind": "arxiv",
    "version": 1
  }
}