Pith Number

pith:QAQQWCZ5

pith:2011:QAQQWCZ56UTTW7D4RPCT6XQA34

not attested not anchored not stored refs pending

The tractability of CSP classes defined by forbidden patterns

Andr\'as Z. Salamon, David A. Cohen, Martin C. Cooper, P\'aid\'i Creed

arxiv:1103.1542 v2 · 2011-03-08 · cs.AI · cs.CC · 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{QAQQWCZ56UTTW7D4RPCT6XQA34}

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	2026-05-18T02:48:10.249650Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80210b0b3df5273b7c7c8bc53f5e00df0749d64eae76de6dd0a5da33a4511387

Aliases

arxiv: 1103.1542 · arxiv_version: 1103.1542v2 · doi: 10.48550/arxiv.1103.1542 · pith_short_12: QAQQWCZ56UTT · pith_short_16: QAQQWCZ56UTTW7D4 · pith_short_8: QAQQWCZ5

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/QAQQWCZ56UTTW7D4RPCT6XQA34 \
  | 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: 80210b0b3df5273b7c7c8bc53f5e00df0749d64eae76de6dd0a5da33a4511387

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "08091278c2537f39776698edba8df908df694c18a223c6d48bf1c2bd563db14b",
    "cross_cats_sorted": [
      "cs.CC",
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2011-03-08T14:43:17Z",
    "title_canon_sha256": "242a7e74fb0842470515bf127e38d221160d6b33f9494680b13920cb352c8e71"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1103.1542",
    "kind": "arxiv",
    "version": 2
  }
}