Pith Number

pith:BY54JGB3

pith:2011:BY54JGB3UTSMYLVMCQSCE6C73R

not attested not anchored not stored refs pending

Confronting Intractability via Parameters

Dimitrios M. Thilikos, Rodney G. Downey

arxiv:1106.3161 v6 · 2011-06-16 · 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{BY54JGB3UTSMYLVMCQSCE6C73R}

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	2026-05-18T04:07:54.011152Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0e3bc4983ba4e4cc2eac142422785fdc5a4c264b44020a982998a3bc914ea832

Aliases

arxiv: 1106.3161 · arxiv_version: 1106.3161v6 · doi: 10.48550/arxiv.1106.3161 · pith_short_12: BY54JGB3UTSM · pith_short_16: BY54JGB3UTSMYLVM · pith_short_8: BY54JGB3

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/BY54JGB3UTSMYLVMCQSCE6C73R \
  | 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: 0e3bc4983ba4e4cc2eac142422785fdc5a4c264b44020a982998a3bc914ea832

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "38778a7a1f7e7719c097a1addb399b0069162fe6c6fa2ff8ad745d11225ad875",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2011-06-16T07:19:22Z",
    "title_canon_sha256": "7ec5baf27080a4cbea8f1816bbb3f370a117205d02d54a18a753798dac3a0972"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1106.3161",
    "kind": "arxiv",
    "version": 6
  }
}