Pith Number

pith:N6NAE4DB

pith:2018:N6NAE4DBUAF36BPQ4SNX3QIO3P

not attested not anchored not stored refs pending

A 2-Approximation Algorithm for Feedback Vertex Set in Tournaments

Daniel Lokshtanov, Fahad Panolan, Geevarghese Philip, Joydeep Mukherjee, Pranabendu Misra, Saket Saurabh

arxiv:1809.08437 v1 · 2018-09-22 · 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{N6NAE4DBUAF36BPQ4SNX3QIO3P}

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	2026-05-18T00:05:08.484841Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6f9a027061a00bbf05f0e49b7dc10edbdd284983f18c934894a8bb6374133bc4

Aliases

arxiv: 1809.08437 · arxiv_version: 1809.08437v1 · doi: 10.48550/arxiv.1809.08437 · pith_short_12: N6NAE4DBUAF3 · pith_short_16: N6NAE4DBUAF36BPQ · pith_short_8: N6NAE4DB

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/N6NAE4DBUAF36BPQ4SNX3QIO3P \
  | 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: 6f9a027061a00bbf05f0e49b7dc10edbdd284983f18c934894a8bb6374133bc4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "41ed0b1dd0520fb6bd89f35dc2a672d68d8eb38557c0de6dc5901adc5f9c590e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2018-09-22T13:52:50Z",
    "title_canon_sha256": "14afb4df0275c25d7ebb6fff41e8c51f5b6ebff2e5e8e155dd6076a3c64fb9c2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.08437",
    "kind": "arxiv",
    "version": 1
  }
}