Pith Number

pith:6UUOSQ25

pith:2017:6UUOSQ25XNDICGKGRHHAJ57HZF

not attested not anchored not stored refs pending

Ruling out FPT algorithms for Weighted Coloring on forests

Ignasi Sau, Julien Baste, J\'ulio Ara\'ujo

arxiv:1703.09726 v1 · 2017-03-28 · cs.DS · cs.CC · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{6UUOSQ25XNDICGKGRHHAJ57HZF}

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	2026-05-18T00:47:39.674497Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f528e9435dbb4681194689ce04f7e7c97697a2b6d766a74cebdb503c522e13b1

Aliases

arxiv: 1703.09726 · arxiv_version: 1703.09726v1 · doi: 10.48550/arxiv.1703.09726 · pith_short_12: 6UUOSQ25XNDI · pith_short_16: 6UUOSQ25XNDICGKG · pith_short_8: 6UUOSQ25

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/6UUOSQ25XNDICGKGRHHAJ57HZF \
  | 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: f528e9435dbb4681194689ce04f7e7c97697a2b6d766a74cebdb503c522e13b1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "59fc9d99f44c905f20f5eea903a633e0767e14205166f1a1897219b3bf0250cf",
    "cross_cats_sorted": [
      "cs.CC",
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2017-03-28T18:01:14Z",
    "title_canon_sha256": "7c7604a5e69222b60d78a8e04eb4285586013cbf252637208db64ffe835d9216"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1703.09726",
    "kind": "arxiv",
    "version": 1
  }
}