Pith Number

pith:AB7EHRSN

pith:2011:AB7EHRSNMZ4S2LDTOWPYISMCQR

not attested not anchored not stored refs pending

Satisfiability of Acyclic and Almost Acyclic CNF Formulas

Daniel Paulusma, Sebastian Ordyniak, Stefan Szeider

arxiv:1104.4279 v2 · 2011-04-21 · 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{AB7EHRSNMZ4S2LDTOWPYISMCQR}

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	2026-05-18T03:29:14.126244Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

007e43c64d66792d2c73759f8449828465448c557cdb94fa575b7222e5e24c4b

Aliases

arxiv: 1104.4279 · arxiv_version: 1104.4279v2 · doi: 10.48550/arxiv.1104.4279 · pith_short_12: AB7EHRSNMZ4S · pith_short_16: AB7EHRSNMZ4S2LDT · pith_short_8: AB7EHRSN

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/AB7EHRSNMZ4S2LDTOWPYISMCQR \
  | 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: 007e43c64d66792d2c73759f8449828465448c557cdb94fa575b7222e5e24c4b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bfe7d86eddab3c2b2b3cb186e3c86d0d8f03c98ace4a2dad214727e297d2bdf1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2011-04-21T15:01:02Z",
    "title_canon_sha256": "0721404b3db9cbb9dc847beda6df35a38d9998fcbb2c7f6b1e6203af158dd3e4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.4279",
    "kind": "arxiv",
    "version": 2
  }
}