Pith Number

pith:FPNTHXYV

pith:2016:FPNTHXYVF72O7YPAEEXQXQM2CW

not attested not anchored not stored refs pending

Model Checking the Logic of Allen's Relations Meets and Started-by is $P^NP$-Complete

Adriano Peron (University of Napoli "Federico II", Alberto Molinari (University of Udine, Angelo Montanari (University of Udine, Italy), Laura Bozzelli (Technical University of Madrid (UPM), Pietro Sala (University of Verona, Spain)

arxiv:1609.04090 v1 · 2016-09-14 · cs.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{FPNTHXYVF72O7YPAEEXQXQM2CW}

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	2026-05-18T01:04:40.664936Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2bdb33df152ff4efe1e0212f0bc19a15ad82db4efbaa1a119a6af15317a65689

Aliases

arxiv: 1609.04090 · arxiv_version: 1609.04090v1 · doi: 10.48550/arxiv.1609.04090 · pith_short_12: FPNTHXYVF72O · pith_short_16: FPNTHXYVF72O7YPA · pith_short_8: FPNTHXYV

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/FPNTHXYVF72O7YPAEEXQXQM2CW \
  | 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: 2bdb33df152ff4efe1e0212f0bc19a15ad82db4efbaa1a119a6af15317a65689

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "40da269b5f0970bf72fff8811cdc5a1e4988d1d39cb792d9a362f3f1e285d536",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2016-09-14T00:58:20Z",
    "title_canon_sha256": "2d1daa93c966cc9aa3f71290078d3d644a4b29239543cddcd342194163889efd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1609.04090",
    "kind": "arxiv",
    "version": 1
  }
}