Pith Number

pith:QDKJVW4M

pith:2012:QDKJVW4M4G2THNQ7UDMHOQNLNW

not attested not anchored not stored refs pending

Improved Separations of Regular Resolution from Clause Learning Proof Systems

Jan Johannsen, Maria Luisa Bonet, Sam Buss

arxiv:1208.2469 v1 · 2012-08-12 · cs.LO · math.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QDKJVW4M4G2THNQ7UDMHOQNLNW}

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	2026-05-18T03:48:57.792057Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80d49adb8ce1b533b61fa0d87741ab6db4d78d8c903f5df8b7b66bb2c90f6efe

Aliases

arxiv: 1208.2469 · arxiv_version: 1208.2469v1 · doi: 10.48550/arxiv.1208.2469 · pith_short_12: QDKJVW4M4G2T · pith_short_16: QDKJVW4M4G2THNQ7 · pith_short_8: QDKJVW4M

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/QDKJVW4M4G2THNQ7UDMHOQNLNW \
  | 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: 80d49adb8ce1b533b61fa0d87741ab6db4d78d8c903f5df8b7b66bb2c90f6efe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "69a8449a4cf3c2fea8b1b5161e778eb849573f8337175836d8041a5c3208b472",
    "cross_cats_sorted": [
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2012-08-12T22:22:06Z",
    "title_canon_sha256": "79db38fb7e0bf7a4db115ed496f382ebb0f86c09ca9735da26e61360e0053c45"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.2469",
    "kind": "arxiv",
    "version": 1
  }
}