Pith Number

pith:PGAZKGF5

pith:2018:PGAZKGF5AO5ZNEBL2SQ4QVNAE7

not attested not anchored not stored refs pending

On Strong NP-Completeness of Rational Problems

Dominik Wojtczak

arxiv:1802.09465 v1 · 2018-02-26 · cs.DM · cs.AI · 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{PGAZKGF5AO5ZNEBL2SQ4QVNAE7}

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	2026-05-18T00:22:33.645631Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

79819518bd03bb96902bd4a1c855a027ef464a8ad51e9ba636d1f3153a5545e3

Aliases

arxiv: 1802.09465 · arxiv_version: 1802.09465v1 · doi: 10.48550/arxiv.1802.09465 · pith_short_12: PGAZKGF5AO5Z · pith_short_16: PGAZKGF5AO5ZNEBL · pith_short_8: PGAZKGF5

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/PGAZKGF5AO5ZNEBL2SQ4QVNAE7 \
  | 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: 79819518bd03bb96902bd4a1c855a027ef464a8ad51e9ba636d1f3153a5545e3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fac2586e3d8d509007ae48c8fc703498310761d4759f069ab440cf5c761b9f58",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.CC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2018-02-26T17:23:02Z",
    "title_canon_sha256": "19e8878ac039e69143c576ab730a773d02acd80072b7971e40a4b93751f8562d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.09465",
    "kind": "arxiv",
    "version": 1
  }
}