Solution-Prove the ideal of z is principal

Prove the ideal of z is principal

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1. If E, F are fields and F is a subring of E, show each q in Aut(E/F) permutes the roots in E of each nonzero p(x) in F[x]. Hint if p(x)=a0+a1x+a2x^2+. . . +anx^n then p(x) has at most n roots in E. show that for z in E, p(z)=0 implies p(q(z))=0

2 If R is a commutative ring of prime characteristic p, show the function f:R-->R, f(r)=r^p is a ring homomorphism

3. If a,b are positive integers with greatest common divisor d and least common multiple m, show aZ+bZ=dZ and aZ intersect bZ=mZ

4. For the cyclic group (Z,+) = <1> prove the ideal of Z is principal

Reference no: EM131027716

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Prove the ideal of z is principal

Reference no: EM131027716

Reference no: EM131027716

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