48. Let G be a group and g = G. Show that Z(G) = {x ≤ G : gx = xg for all g = G} is a subgroup of G. This subgroup is called the center of G.

Q: 1. Let G be a group and H a nonempty subset of G. Then H <G if ab-EH whenever a,bEH

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Q: subgroups of G. Let x,y e G. We define the relation x ~ y by the following definition: x ~ y iff y =…

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Q: 2. For both parts below, let p :G → G' be a group homomorphism. Let H' be a subgroup of G'. Show…

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Q: Defn: Let  H be a subgroup of G.  NG(H)={g∈ G | gHg-1=H } is called the normalized of H in G. a)…

A: First, we define a Normal subgroup.A subgroup H of a group G is said to be normal subgroup of G if…

Q: If you let G and H be two groups and consider the product group G x H and let K be the subset of G x…

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Q: Let X be a set, G a group, Sx={f:X→X | f is bijective on G} is a group with composition. Given x0∈X…

A: Solution:- given G is a group and X is a subset of G . Here we have to Show subgroup property

Q: Let G = GL2(R). {[ {[ а (a) Prove that T = | a, c, d e R, ad is a subgroup of G. d a (b) Prove that…

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Q: 2. Let (G, *) and (G', $) be groups, and let : G→ G' be a homomorphism. Let K be a subgroup of G'.…

A: Given that ϕ:G→G' be a homomorphism  and K be a subgroup of G' define H=g∈G:ϕ(g)∈K  Claim H is a…

Q: Let G and H be groups. Let p : G → H be a homomorphism and let E < H be a subgroup. Prove that p(E)…

A: Given: φ:G→H is a group homomorphism and E≤H. To prove: a) φ-1(E)≤G b) If E ⊲ H then φ-1E ⊲ G

Q: Let a e G. Prove that $(a") = ¢(a)" for all n e Z.

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Q: 2. Let G and H be groups, and let a: G H be a homomorphism. Prove the following statements. (a) a(G)…

A: Let us prove above results

Q: 2. Let G and H be any two groups. Define the set G x {e} = {(g, eμ) | gЄG} which is a subset of G ×…

A: Step 1: Step 2: Step 3: Step 4:

Q: t G be a group and let a be one fixed element of G. Show that Ha = {x € G|xa = ax} a subgroup of G.

A: We have to prove if x and y on Ha then xy^-1 lies in Ha

Q: Let G be a group. Define Z(G) = {x G | xg = gr for all g € G}. Prove Z(G) ≤ G. Find Z(S3) and Z(D4).

A: Solution:Let  G be a group. Define Clearly, eSuppose be  arbitrary.Then,  [since, x,y]Thus, 2nd…

Q: 1. Let G be a group. Define the center of G by C(G) = {x € G: xg = Prove that C(G) is always a…

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Q: Let H be a subgroup of G and let K=⋂φ∈Aut(G)φ(H). Show that K is characteristic in G

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Q: ¹) Let H be a subgroup of a group G. Define NĠ (H) : = {g €G | g Hg¯¹ = H}. Prove that N(H) is a…

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Q: 5. True or False. Explain your answers. (a) Suppose f: G → H is a homomorphism and g € G. Then, the…

A: We have to answer that statements are true or false.

Q: (4) Let G be a group and H ≤ G. The subgroup H is normal in its normalizer NG(H), this imply that…

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Q: 19. Let H and K be subgroups of a group G. Prove that gH ngK is a coset of HOK in G.

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Q: 6. Let G be a group. An isomorphism from G to G is called an automorphism of G. The set of all…

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Q: 5. Decide if each of the following sets H is a subgroup or not of the group G =R x R, where the…

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Q: Let G be a group and H ≤ G. (a) Prove for any a € G, aHa-¹ ≤G. (b) Let x E G and Prove C (x) ≤ G.…

A: Vital instruction : According to Bartleby Guideline , i can solve at most first three subparts if…