Project for 2019 Skoltech NLA course. Nikita Petrashen, Daniil Svirskiy, Nikita Drobyshev, Dinar Sharafutdinov Realisation of Spectral relaxation for K-means clustering (Hongyuan Zha, Xiaofeng He, Chris Ding, Horst Simon, and Ming Gu, 2001, NIPS)