نبوm i n ∑ i = 1 M ϕ ( y i , ( Φ x ) i ) {\displaystyle {\mathit {min}}\sum _{i=1}^{M}\phi (y_{i},({\boldsymbol {\Phi }}x)_{i})} s . t . ‖ x ‖ 2 = 1 , ‖ x ‖ 0 < K {\displaystyle {\mathit {s.t.}}{\begin{Vmatrix}x\end{Vmatrix}}_{2}=1,{\begin{Vmatrix}x\end{Vmatrix}}_{0}<\ K} ϕ ( x , y ) = { 0 , if x . y ≥ 0 | x . y | ...
