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İsmail İlkan Ceylan

2 accepted papers

2021

Preferred Explanations for Ontology-Mediated Queries under Existential Rules

AAAI 2021technical

Recently, explanations for query answers under existential rules have been investigated, where an explanation is an inclusion-minimal subset of a given database that, together with the ontology, entails the query. In this paper, we take a step further and study explanations under different minimalit…

Cited by 17SourcePDFScholar
2021

The Surprising Power of Graph Neural Networks with Random Node Initialization

IJCAI 2021poster

Graph neural networks (GNNs) are effective models for representation learning on relational data. However, standard GNNs are limited in their expressive power, as they cannot distinguish graphs beyond the capability of the Weisfeiler-Leman graph isomorphism heuristic. In order to break this expressi…

Cited by 289SourcePDFScholar