Pith Number

pith:J5VS6UAJ

pith:2020:J5VS6UAJ4XHDSP74H77HI32FG4

not attested not anchored not stored refs pending

FPT and kernelization algorithms for the k-in-a-tree problem

Guilherme C. M. Gomes, Jayme L. Szwarcfiter, Murilo V. G. da Silva, Vinicius F. dos Santos

arxiv:2007.04468 v1 · 2020-07-08 · 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{J5VS6UAJ4XHDSP74H77HI32FG4}

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	2026-07-05T01:17:30.419344Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4f6b2f5009e5ce393ffc3ffe746f4537087867f6c16b52fe95b89cffe53d9727

Aliases

arxiv: 2007.04468 · arxiv_version: 2007.04468v1 · doi: 10.48550/arxiv.2007.04468 · pith_short_12: J5VS6UAJ4XHD · pith_short_16: J5VS6UAJ4XHDSP74 · pith_short_8: J5VS6UAJ

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/J5VS6UAJ4XHDSP74H77HI32FG4 \
  | 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: 4f6b2f5009e5ce393ffc3ffe746f4537087867f6c16b52fe95b89cffe53d9727

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0ed388c16c4e7005bcc5023c7fe303b74512a968fcf5ce937669cfe00a89cdbd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2020-07-08T22:53:27Z",
    "title_canon_sha256": "532669877341108fa177d241cd5253155dcd975b65d8ca7b4ecb5eec2a8221dc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2007.04468",
    "kind": "arxiv",
    "version": 1
  }
}