Pith Number

pith:42M33IRV

pith:2016:42M33IRV2KDTAL3ECD7PBEC5WK

not attested not anchored not stored refs pending

A Linear Time Parameterized Algorithm for Directed Feedback Vertex Set

Daniel Lokshtanov, M. S. Ramanujan, Saket Saurabh

arxiv:1609.04347 v1 · 2016-09-14 · 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{42M33IRV2KDTAL3ECD7PBEC5WK}

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	2026-05-18T01:04:38.189472Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e699bda235d287302f6410fef0905db2bd02edfcdccb41122c427ebcd7858c47

Aliases

arxiv: 1609.04347 · arxiv_version: 1609.04347v1 · doi: 10.48550/arxiv.1609.04347 · pith_short_12: 42M33IRV2KDT · pith_short_16: 42M33IRV2KDTAL3E · pith_short_8: 42M33IRV

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/42M33IRV2KDTAL3ECD7PBEC5WK \
  | 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: e699bda235d287302f6410fef0905db2bd02edfcdccb41122c427ebcd7858c47

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fd12bd8d6596c617ceabbaec456812b8fb569a1bb81a554b932dec9a2654c996",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2016-09-14T17:03:19Z",
    "title_canon_sha256": "c30f3bb086d96597208e69500305f86f6f2b6b113565f48a291c7205d0c34378"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1609.04347",
    "kind": "arxiv",
    "version": 1
  }
}