what is a laplacian graph why laplacian graphs are used why we use similar matrix for graph when building similarity graph why use similarity matrix why is it necessary to make a laplacian graph how do we build parallelism graphs why we use laplacian graph why do we make similarity graph with similarity matrix why do we construct laplacian graph why we create laplacian graph in spectral clustering why use laplacian graph in clustering why do we use laplacian graph in clustering why are laplacian graphs useful why we create a laplacian graph why create laplacian graph in clustering why are clustering algorithms used in spectral clustering? why we use laplacian graph which graph is based on similarity matrix why we use laplacian graph why do we use similarity matrix to create laplacian graph