Let us consider that S is subset of group G such that                      S = { x in G ; x^2=e }  Where e is identity element of G. then prove that S is subgroup.

Q: Let G be an abelian group and let H= {g EG: g^n= e for some nEN}. Prove that H is a subgroup of G.

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Q: Question 7. Prove or disprove: (a) The union of two subgroups of a group (G, *) is a subgroup of G.…

A: 7)  We need to prove or disprove the given statements. a) The union of two subgroups of a group G ,…

Q: Suppose that g and h induce the same inner automorphism of a group G. Prove that h-'g E Z(G).

A: Given: g , h induce the same inner automorphism of a group G. Prove that: h-1g∈ZG.

Q: Build the operation table ∗ on G = {e, a, b} knowing that (G, ∗) is a group.

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Q: Let Phi be an isomorphism from a group G onto a group H. Prove that phi (Z(G)) phi Z(H) , (i.e. the…

A: Given that phi is an isomorphism from a group G to a group H.Z(G) denote the center of the group G…

Q: Let G be a group and let a,b element of G such that (a^3)b = ba. If |a| = 4 and |b| = 2, what is…

A: see below the answer

Q: ts] Let G be a group, and let H be a subgroup of G. Show that if G is cyclic then H is also cyclic.…

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Q: If f is an isomorphism of a group G into a group H, prove that (f(a))n=e' if and only if an=e. Give…

A: Suppose f is an isomorphism from G to H, and let a be an element of G. Then: (f(a))^n = e' if and…

Q: Let ø be a homomorphism from a group G to a group G'. Prove that ker øis a subgroup of G.

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Q: Let : G H be a homomorphism. Let (G) = {(g) | ge G}. Show that (G) is a subgroup of H.

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Q: Let H and K be finite subgroups of a group G and a E G. Then prove that |HaK| = |H||K| /|HnaKa-|.

A: Given that H and K are the finite subgroups of a group G and also an element a such that a∈G Here,…

Q: Show that the center Z(G) is a normal subgroup of the group G. Please explain in details and show…

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Q: 1) Let G = {e,a,a',a²,a*,a,a°,a'] where a = e and let H = (a*) be a cyclic subgroup %3D %3D %3D of…

A: We have to find quotient group  G/H .

Q: Exercise 8.6. Let G be a group. (a) Prove that G = {e} ≈ G. (b) Prove that G/{e} ≈ G. (c) Prove that…

A: 8.6 Let G be a group   (a) To Prove: G⊕e≅G (b) To Prove: G/e≅G (c) To Prove: G×e≅G

Q: Let N be a normal subgroup of a finite group G.  Prove that the order of the group element gN in G/N…

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Q: If G is a finite solvable group, show that there exist subgroups of G {e} = H, C H, C H, C · · CH, =…

A: We need to prove that there exist subgroups of G, e=H0⊂H1⊂H2⊂...⊂Hn=G such that Hi+1Hi has prime…

Q: Let G be a group with order 8. If a is an element of G such that the order of a is 4, find the order…

A: The order of an element a in a group G is the smallest positive integer n such that an=e, where e is…

Q: (a) If H and K are subgroups of a group G, prove that HK is a subgroup of H and a subgroup of K. b)…

A: a) Let  S be a subset of a group G. Then S is subgroup of G iff i) for a,b∈S ⇒ab∈S ii)for a∈S⇒ a-1∈S

Q: Let G be a group and H, K≤ G normal subgroups of G. Prove HnK≤G.

A: Given that  is a group and  are normal subgroups of .We need to prove that  is a normal subgroup.We…

Q: Theorem 2. Let G, and G, be groups, then @ Gx G,= G, × G, (6) If H = {(a, e,)| a e G} and H, = {(e,…

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Q: 32) Prove that every subgroup of Q8 in normal. For each subgroup, find the isomorphism type of its…

A: The elements of the group are given by, Q8=1,-1, i, -i, j,-j, k, -k Note that every element of Q8…

Q: Let K be a subgroup of G and let H = {g : gKg^-1} = K. Show that H is a subgroup of G

A: Let K be a subgroup of G and H be defined as H = { g : gKg-1 = K }. Then, we have to show that H is…

Q: If (G,*) is group and each subgroups of (G,*) is normal subgroups then (G,*) is abelian group.

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Q: f f is a homomorphism of group G into a  group G' with Kernal K, then K is a normal  subgroup of G.

A: If f is a homomorphism of group G into a group G' with Kernlal K, then we have to prove that K is a…

Q: Prove that every subgroup of the quaternion group Qs is normal. Deter mine all the quotient groups.

A: The given group is Q8=±1,±i,±j,±k. There are four non trivial subgroups namely: -1=1,-1.…

Q: (6) Let G be a noncommutative group. Show that G has a nontrivial subgroup.

A: We recal Cauchy's theorem and then use it

Q: Definition 4.24: Let G be a group, and let Ω be the set of subgroups of G. Let G act on Ω by…

A: We prove our claim by using definition of NG(H).

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: Consider a group G with operation * and identity element e. Show that for any element a in G, there…

A: In any group G, we define a group as a set G equipped with an operation * that combines any two…

Q: 4. Prove that the set H = nEZ is a cyclic subgroup of the group GL(2, R).

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Q: Let G be a group. Prove that Z(G) is a subgroup of G.

A: The set ZG=x∈G|xg=gx,∀g∈G of all elements that commute with every other element of G is called the…

Q: Consider the subgroup H = (i) of the the group (C\{0},.). LIT TT TT?

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Q: Consider the group A₁. Let H = {e, (12)(34), (13)(24), (14)(23)}. (a) Show that H is a subgroup of…

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Q: Consider 2-element group {} where + is the identity. Show that the map RX → {±} sending a to its…

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