Pith Number

pith:QAUTEZQO

pith:2017:QAUTEZQOPC3A5REMHP22VEEVZK

not attested not anchored not stored refs pending

Tree Projections and Constraint Optimization Problems: Fixed-Parameter Tractability and Parallel Algorithms

Francesco Scarcello, Georg Gottlob, Gianlugi Greco

arxiv:1711.05216 v1 · 2017-11-14 · 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{QAUTEZQOPC3A5REMHP22VEEVZK}

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	2026-05-18T00:30:34.484217Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

802932660e78b60ec48c3bf5aa9095cab3b4a9f332702e76c483105d22d10d57

Aliases

arxiv: 1711.05216 · arxiv_version: 1711.05216v1 · doi: 10.48550/arxiv.1711.05216 · pith_short_12: QAUTEZQOPC3A · pith_short_16: QAUTEZQOPC3A5REM · pith_short_8: QAUTEZQO

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/QAUTEZQOPC3A5REMHP22VEEVZK \
  | 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: 802932660e78b60ec48c3bf5aa9095cab3b4a9f332702e76c483105d22d10d57

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4378786aab9bd6513ee9f90e2f0408377770a53ded7da211171c35c9fefae9ed",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2017-11-14T17:30:08Z",
    "title_canon_sha256": "02c360e88c42f6203886446171e5cec390aa49be080ce8d5040208568892fe98"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1711.05216",
    "kind": "arxiv",
    "version": 1
  }
}