Compute 2^i in ℤ/11 for i=1,2,...,10. Hence, or otherwise, define a correspondence between the elements of ℤ/10 and the elements of U(11) under which if x+y=z in ℤ/10, and x,y,z correspond to a,b,c in U(11), respectively, then ab=c in U(11).
Compute 2^i in ℤ/11 for i=1,2,...,10. Hence, or otherwise, define a correspondence between the elements of ℤ/10 and the elements of U(11) under which if x+y=z in ℤ/10, and x,y,z correspond to a,b,c in U(11), respectively, then ab=c in U(11).