Can you explain these for me..I mean give example for each of them to get the idea
Can you explain these for me..I mean give example for each of them to get the...
Let a : G + H be a homomorphism. Which of the following statements must necessarily be true? Check ALL answers that are necessarily true. There may be more than one correct answer. A. If kera is trivial (i.e., ker a = {eg}), then a is injective. B. If the image of a equals H, then a is injective. C. The first isomorphism theorem gives an isomorphism between the image of a and a certain quotient group. D. The first...
I have to use the following theorems to determine whether or not it is possible for the given orders to be simple. Theorem 1: |G|=1 or prime, then it is simple. Theorem 2: If |G| = (2 times an odd integer), the G is not simple. Theorem 3: n is an element of positive integers, n is not prime, p is prime, and p|n. If 1 is the only divisor of n that is congruent to 1 (mod p) then...
10. Let G = D. be the dihedral group on the octagon and let N = (r) be the subgroup of G generated by r4. (a) Prove that N is a normal subgroup of G. (b) If G =D3/N, find G. (c) Using the bar notation for cosets, show that G = {e, F, 2, 3, 5, 87, 82, 83}. Hint: Show that the RHS consists of distinct elements and then use part (b). (d) Prove that G-D4. Hint: It...
Let Hi be a subgroup of G that is not normal in G. Let H-ф-1H1ф be a cong gate subgroup. (i) ф is an automorphism of F. Show that its restricts to an isomorphism ф : FH2-> FHI. (iüi) Show that if a e Fla but not in Flh n Fta, and if f is the irreducible polynomial for a, then f does not split over FHa (thus Fs is not a normal extension). Let Hi be a subgroup of...
9) A group G is called solvable if there is a sequence of subgroups such that each quotient Gi/Gi-1 is abelian. Here Gi-1 Gi means Gi-1 is a normal subgroup of Gi. For example, any abelian group is solvable: If G s abelian, take Go f1), Gi- G. Then G1/Go G is abelian and hence G is solvable (a) Show that S3 is solvable Suggestion: Let Go- [l),Gı-(123)), and G2 -G. Here (123)) is the subgroup generated by the 3-cycle...
Answer Question 5 . Name: 1. Prove that if N is a subgroup of index 2 in a group G, then N is normal in G 2. Let N < SI consists of all those permutations ơ such that o(4)-4. Is N nonnal in sa? 3. Let G be a finite group and H a subgroup of G of order . If H is the only subgroup of G of order n, then is normal in G 4. Let G...
please look at red line please explain why P is normal thanks Proposition 6.4. There are (up to isomorphism) exactly three di groups of order 12: the dihedral group De, the alternating group A, and a generated by elements a,b such that lal 6, b a', and ba a-b. stinct nonabelian SKETCH OF PROOF. Verify that there is a group T of order 12 as stated (Exercise 5) and that no two of Di,A,T are isomorphic (Exercise 6). If G...
here are the answers but I don't know how to get them. can you show me the process? We were unable to transcribe this image2hen o ylnbe is camerdel arth 3m Vibratton diphceot 2hen o ylnbe is camerdel arth 3m Vibratton diphceot
here are the answers but I don't know how to get them. can you show me the process? 200mm DAc roolis 200 mm ushen the discis twitted a] thererend vbrti.nic /./3Sen rod dise, and dotng Jamng exhumom b) ahen teg ear rep lpces the 200mm DAc roolis 200 mm ushen the discis twitted a] thererend vbrti.nic /./3Sen rod dise, and dotng Jamng exhumom b) ahen teg ear rep lpces the
I HAVE the answer (B) but i dont know how to get it, please explain. my professor wrote down a bunch of equations but i dont understand them, please explain in words as if i were stupid. i have attached the sheet of notes he wrote on this problem to make your life much easier, you dont really have to solve anything, as the answers are right here, all you have to do is literally explain to me how these...