大家好
這裡有幾題想問各位
1. which can not be the number of elements of a Galois field ?
a) 21 b)23 c)25 d)27 ANS: a)
2. how many irreducible polynomials of degree 9 over GF2.
a) 53 b)55 c)57 d)59 e) none of the above ANS: e)
3. Suppose a belongs to GF8 is a root of x^3 + x + 1.
whose minimal polynomial is x^3 + x +1 ?
a) a^2 b) a^3 + a^2 c) a^4 d) a^4 + a^2 ANS: b)
4. which ideal is not the same as principal ideal of <6> in Z ?
a) <-6,42> b) <36,48> c) <18,-24> d) <30,60,72> ANS: b)
謝謝!
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