... ; x2 X, y1 F(x1), y2 F(x2): (x1, y1) , (x2, y2) GraphF 1 1 1 (x1, y1) + (x2, y2) = ( x1 + x2, y1 + y2) GraphF 2 2 2 1 1 1 y1 + y2 = (y1 + y2) F( x1 + x2) = F(x1 + x2) (theo ii) 2 2 2 ... x1; x2 DomF, [0, 1], y1 F(x1) v y2 F(x2): (x1, y1), ( x2, y2) GraphF (x1 + (1 x2); y1 + (1 y2)) = (x1, y1) + (1 )( x2, y2) GraphF y1 + (1 y2) F(x1 + (1 x2)) .F(x1) + (1 - ).F(x2) ... (y2, x2) GraphF-1, [0, 1]: y1 F(x1) v y2 F(x2) (x1, y1), (x2, y2) GraphF .(x1 ; y1) + (1 ).(x2 ; y2) GraphF (.x1 + (1 )x2, .y1 + (1 ).y2) GraphF .y1 + (1 ).y2 F(.x1 + (1 )x2)...