3 Density-Aware Clustering based on Aggregated Heat Kernel and Its
Transformation 23
3.1 Chapter Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.2 Related Works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.3 Aggregated Heat Kernel (AHK) and Its Use in Clustering . . . . . 28