Pith Number

pith:BVSLI25V

pith:2013:BVSLI25VNCYQLV4YS2IF2FCTC5

not attested not anchored not stored refs pending

Tree Deletion Set has a Polynomial Kernel (but no OPT^O(1) approximation)

Archontia C. Giannopoulou, Daniel Lokshtanov, Ondrej Suchy, Saket Saurabh

arxiv:1309.7891 v1 · 2013-09-30 · cs.DS · cs.DM

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BVSLI25VNCYQLV4YS2IF2FCTC5}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T03:11:47.897915Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0d64b46bb568b105d79896905d14531741b6e47d3385029c7060ff668b09b80d

Aliases

arxiv: 1309.7891 · arxiv_version: 1309.7891v1 · doi: 10.48550/arxiv.1309.7891 · pith_short_12: BVSLI25VNCYQ · pith_short_16: BVSLI25VNCYQLV4Y · pith_short_8: BVSLI25V

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/BVSLI25VNCYQLV4YS2IF2FCTC5 \
  | 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: 0d64b46bb568b105d79896905d14531741b6e47d3385029c7060ff668b09b80d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "90ffaae97c85a225011cf5797933930a6260b926c4ffcdc9fbb520fece0477ef",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2013-09-30T15:46:14Z",
    "title_canon_sha256": "e618026bbead99f516f8423932262850c6a374ab58715ee7ba7770ead65752a8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.7891",
    "kind": "arxiv",
    "version": 1
  }
}