Pith Number

pith:2TKQJVTD

pith:2026:2TKQJVTD2Z6U33YQPIFD3YDOQN

not attested not anchored not stored refs pending

$O(n +f(k))$: Truly Linear FPT

Barnaby Martin, Benjamin Merlin Bumpus, David C. Kutner, Ella Yates, Frances Rosamond, Jessica Enright, Laura Larios-Jones, Michael R. Fellows, Rod Downey, Tala Eagling-Vose

arxiv:2606.02492 v1 · 2026-06-01 · cs.CC · cs.DM · 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{2TKQJVTD2Z6U33YQPIFD3YDOQN}

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	2026-06-02T03:05:07.736089Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d4d504d663d67d4def107a0a3de06e834fda357ac909cfb57ced20a4c3a98f9b

Aliases

arxiv: 2606.02492 · arxiv_version: 2606.02492v1 · doi: 10.48550/arxiv.2606.02492 · pith_short_12: 2TKQJVTD2Z6U · pith_short_16: 2TKQJVTD2Z6U33YQ · pith_short_8: 2TKQJVTD

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/2TKQJVTD2Z6U33YQPIFD3YDOQN \
  | 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: d4d504d663d67d4def107a0a3de06e834fda357ac909cfb57ced20a4c3a98f9b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9531af286a70323324adfe86bbc5f5f2959c6e4e1698b66cbd5fced09fe7bd3f",
    "cross_cats_sorted": [
      "cs.DM",
      "cs.DS"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2026-06-01T17:01:31Z",
    "title_canon_sha256": "005c3100245f51682d51b11730608abf523ae3d6a47e128458d5953ec5e92c48"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.02492",
    "kind": "arxiv",
    "version": 1
  }
}