(Hyper)graph Kernels over Simplicial Complexes

Area of Science:

• Computer Science
• Machine Learning
• Data Mining

Background:

• Graphs are widely used for modeling relationships in diverse fields like bioinformatics and social network analysis.
• Hypergraphs generalize graphs by allowing multi-way relations beyond pairwise connections, offering richer modeling capabilities.
• Existing graph kernel methods face limitations when applied to hypergraph structures.

Purpose of the Study:

• To propose and evaluate novel hypergraph kernels for enhanced similarity measurement.
• To extend the applicability of graph kernel methodologies to hypergraph data.
• To bridge the gap between structural pattern recognition and hypergraph analysis.

Main Methods:

• Development of four novel (hyper)graph kernels.
• Inferring simplicial complexes on underlying graphs for kernel computation.
• Comparative analysis on 18 benchmark datasets against state-of-the-art methods.
• Application to a real-world case study involving metabolic pathway classification.

Main Results:

• Demonstrated efficiency and effectiveness of the proposed hypergraph kernels.
• Achieved competitive or superior performance compared to existing approaches on benchmark datasets.
• Successfully applied hypergraph kernels to classify metabolic pathways, showcasing real-world utility.

Conclusions:

• The proposed hypergraph kernels effectively extend graph kernel capabilities to hypergraphs.
• These methods offer a robust approach for similarity analysis in complex, multi-way relational data.
• This work encourages further research in applying kernel methods to hypergraph structures for pattern recognition.