Originally Posted by

**qmech** Using permutation group notation:

Question 1: Is e, (12)(34), (13)(24), (14)(23) a representation of C2 x C2? [Note C2 = cyclic group of order 2.]

Question 2: Is C2 x C2 the group of symmetries of the following 4 numbers (viewed as roots of a polynomial with coefficients in Z)?

1-sqrt(2)

1+sqrt(2)

1-sqrt(3)

1+sqrt(3)

Question 3: If the above 2 assertions are correct, then can I conclude that C2 x C2 is the Galois Group of the polynomial:

(x^2 - 2x - 1)(x^2 - 2x - 2) = (x^4 - 4x^3 +x^2 + 6x + 2)?

(since the first quadratic has (as roots) the first 2 numbers listed, and the 2nd

quadratic has the latter 2)