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Always give rigorous arguments I. (A) Let G be a group under * and let g...
Question 4 Exercise 1. Let G be a group such that |G| is even. Show that...
Question 4
Exercise 1. Let G be a group such that |G| is even. Show that there exists an EG,17e with x = e. Exercise 2. Let G be a group and H a subgroup of G. Define a set K by K = {z € G war- € H for all a € H}. Show that (i) K <G (ii) H <K Exercise 3. Let S be the set R\ {0,1}. Define functions from S to S by e(z)...
3. Let M be a manifold and let G C Homeo(M) be a group acting on M. Suppose that this group actio...
3. Let M be a manifold and let G C Homeo(M) be a group acting on M. Suppose that this group action is properly discontinuous and free prove that the quotient space M/G is a manifold. For this problem properly discontinuous means that if K c M is compact then the set {ge G | g(K) n/Kメ0) is finite) and free means the only element of g that fixes any point of M is the identity.
3. Let M be...
This problem is about abstract algebra, especially is group theory. Let G=GL2(C). which means gen...
this problem is about abstract algebra, especially is group
theory.
Let G=GL2(C). which means general linear group with each
components are complex number.
and let H = {2x2 matrix (a b ; c d) l a,b,c are in Complex
number, ac is not zero}
Prove that every element of G is conjugate to some element of
the subgroup H and deduce that G is the union of conjugates of H [
Show that every element of GL2(C) has an eigenvector...
4. Let G be a group. An isomorphism : G G is called an automorphism of G. (a) Prove that the set,...
the following questions are relative,please solve them,
thanks!
4. Let G be a group. An isomorphism : G G is called an automorphism of G. (a) Prove that the set, Aut(G), of all automorphisms of G forms a group under composition. (b) Let g E G. Show that the map ф9: G-+ G given by c%(z)-gZg", įs an automorphism. These are called the inner automorphisms of G (c) Show that the set of all g E G such that Og-Pe...
Exercise 2. Let he a group anith nentral element e. We denote the gronp lau on G simply by (91,92...
Exercise 2. Let he a group anith nentral element e. We denote the gronp lau on G simply by (91,92)gig2. Let X be a set. An action ofG on X is a a map that satisfies the following tuo conditions: c. Let G be a finite group. For each E X, consider the map (aje- fer all elements r X (b) 9-(92-2) for all 91,92 G and all r E X Show that is surjective and that, for all y...
"2. We say that a group G is cyclic if there exists an element g ∈...
"2. We say that a group G is cyclic if there exists an element g
∈ G such that G = (g) := {gn | n ∈ Z} Given any group
homomorphism φ : G H, say if each of the following is true or
false, and justify. (i) If φ is surjective and G is cyclic, then H
is cyclic. (ii) If φ is injective and G is cyclic, then H is
cyclic. (iii) If φ is surjective and...
Problem 3. Subgroups of quotient groups. Let G be a group and let H<G be a...
Problem 3. Subgroups of quotient groups. Let G be a group and let H<G be a normal subgroup. Let K be a subgroup of G that contains H. (1) Show that there is a well-defined injective homomorphism i: K/ H G /H given by i(kH) = kH. By abuse of notation, we regard K/H as being the subgroup Imi < G/H consisting of all cosets of the form KH with k EK. (2) Show that every subgroup of G/H is...
Problem 3 () (2 marka) Prove that the group R and the circle group St are...
Problem 3 () (2 marka) Prove that the group R and the circle group St are not isomsorphic to each other. Hind เตบ๐s fad element of order 2 m S., Hou about RV (a)(2marks) Let n 2 be an integer, give an escample (including explanatlon) of a group G and a subgroup FH with IG: H-nsuch that H is not normal in G. (iii) (S marks) Let G-16:l : a,b,c ER, a 7.0, eyh 아 You are given that G...
(9) Let G be a group, and let x E G have finite order n. Let...
(9) Let G be a group, and let x E G have finite order n. Let k and l be integers. Prove that xk = xl if and only if n divides l_ k.
Question 4
Exercise 1. Let G be a group such that |G| is even. Show that there exists an EG,17e with x = e. Exercise 2. Let G be a group and H a subgroup of G. Define a set K by K = {z € G war- € H for all a € H}. Show that (i) K <G (ii) H <K Exercise 3. Let S be the set R\ {0,1}. Define functions from S to S by e(z)...
3. Let M be a manifold and let G C Homeo(M) be a group acting on M. Suppose that this group action is properly discontinuous and free prove that the quotient space M/G is a manifold. For this problem properly discontinuous means that if K c M is compact then the set {ge G | g(K) n/Kメ0) is finite) and free means the only element of g that fixes any point of M is the identity.
3. Let M be...
this problem is about abstract algebra, especially is group
theory.
Let G=GL2(C). which means general linear group with each
components are complex number.
and let H = {2x2 matrix (a b ; c d) l a,b,c are in Complex
number, ac is not zero}
Prove that every element of G is conjugate to some element of
the subgroup H and deduce that G is the union of conjugates of H [
Show that every element of GL2(C) has an eigenvector...
the following questions are relative,please solve them,
thanks!
4. Let G be a group. An isomorphism : G G is called an automorphism of G. (a) Prove that the set, Aut(G), of all automorphisms of G forms a group under composition. (b) Let g E G. Show that the map ф9: G-+ G given by c%(z)-gZg", įs an automorphism. These are called the inner automorphisms of G (c) Show that the set of all g E G such that Og-Pe...
Exercise 2. Let he a group anith nentral element e. We denote the gronp lau on G simply by (91,92)gig2. Let X be a set. An action ofG on X is a a map that satisfies the following tuo conditions: c. Let G be a finite group. For each E X, consider the map (aje- fer all elements r X (b) 9-(92-2) for all 91,92 G and all r E X Show that is surjective and that, for all y...
"2. We say that a group G is cyclic if there exists an element g
∈ G such that G = (g) := {gn | n ∈ Z} Given any group
homomorphism φ : G H, say if each of the following is true or
false, and justify. (i) If φ is surjective and G is cyclic, then H
is cyclic. (ii) If φ is injective and G is cyclic, then H is
cyclic. (iii) If φ is surjective and...
Problem 3. Subgroups of quotient groups. Let G be a group and let H<G be a normal subgroup. Let K be a subgroup of G that contains H. (1) Show that there is a well-defined injective homomorphism i: K/ H G /H given by i(kH) = kH. By abuse of notation, we regard K/H as being the subgroup Imi < G/H consisting of all cosets of the form KH with k EK. (2) Show that every subgroup of G/H is...
Problem 3 () (2 marka) Prove that the group R and the circle group St are not isomsorphic to each other. Hind เตบ๐s fad element of order 2 m S., Hou about RV (a)(2marks) Let n 2 be an integer, give an escample (including explanatlon) of a group G and a subgroup FH with IG: H-nsuch that H is not normal in G. (iii) (S marks) Let G-16:l : a,b,c ER, a 7.0, eyh 아 You are given that G...
(9) Let G be a group, and let x E G have finite order n. Let k and l be integers. Prove that xk = xl if and only if n divides l_ k.
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