demo.m

利用C

A;
b1;
b1=x; 
b2; 
b2=x; 
b3; 
b3=x; 

x = A'*b1; 

x'*x 


x = A*b2; 
x'*x 

d = b1 + b3; 
d'*d

e = b1 - b3; 
e'*e

e = b1*3.7; 
e'*e