Pith Number

pith:TR3NC6C2

pith:2011:TR3NC6C2USFBJFZZVFGUU4E7A6

not attested not anchored not stored refs pending

Backdoors to Tractable Answer-Set Programming

Johannes Klaus Fichte, Stefan Szeider

arxiv:1104.2788 v4 · 2011-04-14 · cs.CC · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TR3NC6C2USFBJFZZVFGUU4E7A6}

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	2026-05-18T02:57:00.285805Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9c76d1785aa48a149739a94d4a709f0790035ec8e79834db6fee4c2e5f86b6ee

Aliases

arxiv: 1104.2788 · arxiv_version: 1104.2788v4 · doi: 10.48550/arxiv.1104.2788 · pith_short_12: TR3NC6C2USFB · pith_short_16: TR3NC6C2USFBJFZZ · pith_short_8: TR3NC6C2

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/TR3NC6C2USFBJFZZVFGUU4E7A6 \
  | 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: 9c76d1785aa48a149739a94d4a709f0790035ec8e79834db6fee4c2e5f86b6ee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "973437a44ce4bddba54e804b26a2f33d3ee71c9685ad5029128d15f42a367a77",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2011-04-14T14:59:45Z",
    "title_canon_sha256": "8adca410da813616791287e4cdd8dbaff077ce2743b2743b2dde80b1e1797ca2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.2788",
    "kind": "arxiv",
    "version": 4
  }
}