mIn Z=∑∑cx=1+212+…+n 十C,x十∴C nT2n ∴∴ nnt nn +x12+…+x;+…+x1n=1 x21+x2+…+x21+…+x2n x+x2+…+x+…+x=1 xn1+x,+…+xn+…+x .. st x1,十X;+……+x,+…+x x1+x21+…+x1+…÷心 121422 xn+x,n+…+xn+…+xn=1 当n=4时,有16变量,8个约束方程=  j i ij ij min Z c x n n n n n n n n n n n n c x c x c x c x c x c x c x c x c x + + + + + + + + + = + + +     1 1 2 2 2 1 2 1 2 2 2 2 2 2 1 1 1 1 1 2 1 2 1 1      + + + + + =1 . i1 i2 i j i n x x x x st   1 1 2 + + + + + = j j i j nj x x  x  x i=1,2, …,n j=1,2, …,n 当n=4时，有16变量，8个约束方程            + + + + + = + + + + + = + + + + + = 1 1 1 . 1 2 2 1 2 2 2 2 1 1 1 2 1 1 n n n j n n j n j n x x x x x x x x x x x x st        1 1 1 1 2 12 22 2 2 11 21 1 1 + + + + + = + + + + + = + + + + + = n n i n n n i n i n x x x x x x x x x x x x       