Pith Number

pith:Z7D5KXKD

pith:2017:Z7D5KXKDG3XBWBH27ERCNFZUCN

not attested not anchored not stored refs pending

On W[1]-Hardness as Evidence for Intractability

Ralph C. Bottesch

arxiv:1712.05766 v3 · 2017-12-15 · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Z7D5KXKDG3XBWBH27ERCNFZUCN}

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	2026-05-18T00:10:22.216691Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cfc7d55d4336ee1b04faf922269734137a1fb8a77e564f4657e30a3aee27d1d2

Aliases

arxiv: 1712.05766 · arxiv_version: 1712.05766v3 · doi: 10.48550/arxiv.1712.05766 · pith_short_12: Z7D5KXKDG3XB · pith_short_16: Z7D5KXKDG3XBWBH2 · pith_short_8: Z7D5KXKD

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/Z7D5KXKDG3XBWBH27ERCNFZUCN \
  | 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: cfc7d55d4336ee1b04faf922269734137a1fb8a77e564f4657e30a3aee27d1d2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2f087e5c321ba6e815464ecb93f7faa8044e0ae203626c28f1c6969d0d9722ff",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2017-12-15T17:47:59Z",
    "title_canon_sha256": "f9cef808945cfb0f4b24aa019f9991171b714eb9dd2b9bee79fb0ad5ca08f1c4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1712.05766",
    "kind": "arxiv",
    "version": 3
  }
}