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EXERCISES 1. Let B be the standard Borel subgroup of GL(n, F). Determine all subgroups of SL(n, F) which contain BO...
2 (2+2+1 marks) Consider the function GL(2,R-R A det A a) Prove that f is a surjective homomorphism. b) Verify that N-AL()dAE Ois a nomal subgroup of GL(2.R) GL(2.Ra group? a group? If so, with w...
2 (2+2+1 marks) Consider the function GL(2,R-R A det A a) Prove that f is a surjective homomorphism. b) Verify that N-AL()dAE Ois a nomal subgroup of GL(2.R) GL(2.Ra group? a group? If so, with what operation? c) Is
2 (2+2+1 marks) Consider the function GL(2,R-R A det A a) Prove that f is a surjective homomorphism. b) Verify that N-AL()dAE Ois a nomal subgroup of GL(2.R) GL(2.Ra group? a group? If so, with what operation? c) Is
Let Fn be a free group of rank n. (a) Show that Fn contains a subgroup...
Let Fn be a free group of rank n. (a) Show that Fn contains a subgroup isomorphic to Fk whenever 1 <k <n. (b) Show that F2 contains subgroups isomorphic to Fk for all k > 2, and hence that Fn contains subgroups isomorphic to Fk for all k > 1. (c) Can an infinite group be generated by two elements of finite order? If so, then give an example. If not, then explain why not.
1. Let G be element. Consider the subgroups H = <a) = { a, b, c, d, e} and K = (j)-{ e, j, o, t} the group whose...
1. Let G be element. Consider the subgroups H = <a) = { a, b, c, d, e} and K = (j)-{ e, j, o, t} the group whose Cayley diagram is shown below, and suppose e is the identity rl Carry out the following steps for both of these subgroups. Let the cosets element-wise. (e) Write G as a disjoint union of the subgroup's left cosets. (b) Write G as a disjoint union of the subgroup's right cosets. (c)...
(1) Let 0 0O | f(x) dx +ynf(n). 1(f)= Show that I K(R)R is a well-defined positive linear functional. Then find a regular Borel measure μ such that 1(f)-Jfd,1 for every f K(R). (1) Let 0 0O | f(...
(1) Let 0 0O | f(x) dx +ynf(n). 1(f)= Show that I K(R)R is a well-defined positive linear functional. Then find a regular Borel measure μ such that 1(f)-Jfd,1 for every f K(R).
(1) Let 0 0O | f(x) dx +ynf(n). 1(f)= Show that I K(R)R is a well-defined positive linear functional. Then find a regular Borel measure μ such that 1(f)-Jfd,1 for every f K(R).
1- (2,5+2,5 mark) Consider in GL(2, Q), the subset (a=1 or a=-1),bez Prove that H, with multiplication, is a subgroup of GL(2,Q) a) Is the function b) an homomorphism of groups? Justify your answ...
1- (2,5+2,5 mark) Consider in GL(2, Q), the subset (a=1 or a=-1),bez Prove that H, with multiplication, is a subgroup of GL(2,Q) a) Is the function b) an homomorphism of groups? Justify your answer 2 (3 marks) Let G be a group and a E G an element of order 12. Find the orders of each of the elements of (a) 3- (1+1,5 marks) Let G be a group such that any non-identity element has order 2. Prove that a)...
5. Let F be a field. Show that the set of all n-roots of 1 is...
5. Let F be a field. Show that the set of all n-roots of 1 is a subgroup of Fx.
Answer Question 5 . Name: 1. Prove that if N is a subgroup of index 2...
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...
2. Let n 2 3, and G D2n e,r,r2,... ,r"-1,s, sr, sr2,..., sr-'), the dihedral group with 2n ele- 3...
2. Let n 2 3, and G D2n e,r,r2,... ,r"-1,s, sr, sr2,..., sr-'), the dihedral group with 2n ele- 3, ST, ST,..,ST ments. We let R-(r) denote the subgroup consisting of all rotations. (a) Show that, if M is a subgroup of R, and is in GR, then the union M UrM is a subgroup of G. Here xM-{rm with m in M) (b) Now take n- 12 and M (). How many distinct subgroups does the construction in (a)...
6. Let F be a field and a Fx] a nonconstant polynomial. Denote (that is, (a(x)) is the set of all polynomials in Flr] which are divisble by a()). Then (a) Prove that (a(x)) is a subgroup of the a...
6. Let F be a field and a Fx] a nonconstant polynomial. Denote (that is, (a(x)) is the set of all polynomials in Flr] which are divisble by a()). Then (a) Prove that (a(x)) is a subgroup of the abelian group (Flx],. (b) consider the operation on F[r]/(a()) given by Prove that this operation is well-defined. (c) Prove that the quotient F]/(a(x) is a commutative ing with identity (d) What happens if the polynoial a() is constant?
6. Let F...
8.4 14 *9. Suppose that we are using an T-chart with subgroups of size n -...
8.4 14 *9. Suppose that we are using an T-chart with subgroups of size n - 5 in an idealized setting in which the data is Normally distributed with known mean μ and standard deviation σ. We know that σ,-sd(X)-4. Use also the facts that and Assume that the process is under control and that subgroups are indepen- dent. Suppose that 100 subgroup means are plotted onto the chart over the course of a day. (a) What is the probability...
2 (2+2+1 marks) Consider the function GL(2,R-R A det A a) Prove that f is a surjective homomorphism. b) Verify that N-AL()dAE Ois a nomal subgroup of GL(2.R) GL(2.Ra group? a group? If so, with what operation? c) Is
2 (2+2+1 marks) Consider the function GL(2,R-R A det A a) Prove that f is a surjective homomorphism. b) Verify that N-AL()dAE Ois a nomal subgroup of GL(2.R) GL(2.Ra group? a group? If so, with what operation? c) Is
Let Fn be a free group of rank n. (a) Show that Fn contains a subgroup isomorphic to Fk whenever 1 <k <n. (b) Show that F2 contains subgroups isomorphic to Fk for all k > 2, and hence that Fn contains subgroups isomorphic to Fk for all k > 1. (c) Can an infinite group be generated by two elements of finite order? If so, then give an example. If not, then explain why not.
1. Let G be element. Consider the subgroups H = <a) = { a, b, c, d, e} and K = (j)-{ e, j, o, t} the group whose Cayley diagram is shown below, and suppose e is the identity rl Carry out the following steps for both of these subgroups. Let the cosets element-wise. (e) Write G as a disjoint union of the subgroup's left cosets. (b) Write G as a disjoint union of the subgroup's right cosets. (c)...
(1) Let 0 0O | f(x) dx +ynf(n). 1(f)= Show that I K(R)R is a well-defined positive linear functional. Then find a regular Borel measure μ such that 1(f)-Jfd,1 for every f K(R).
(1) Let 0 0O | f(x) dx +ynf(n). 1(f)= Show that I K(R)R is a well-defined positive linear functional. Then find a regular Borel measure μ such that 1(f)-Jfd,1 for every f K(R).
1- (2,5+2,5 mark) Consider in GL(2, Q), the subset (a=1 or a=-1),bez Prove that H, with multiplication, is a subgroup of GL(2,Q) a) Is the function b) an homomorphism of groups? Justify your answer 2 (3 marks) Let G be a group and a E G an element of order 12. Find the orders of each of the elements of (a) 3- (1+1,5 marks) Let G be a group such that any non-identity element has order 2. Prove that a)...
5. Let F be a field. Show that the set of all n-roots of 1 is a subgroup of Fx.
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...
2. Let n 2 3, and G D2n e,r,r2,... ,r"-1,s, sr, sr2,..., sr-'), the dihedral group with 2n ele- 3, ST, ST,..,ST ments. We let R-(r) denote the subgroup consisting of all rotations. (a) Show that, if M is a subgroup of R, and is in GR, then the union M UrM is a subgroup of G. Here xM-{rm with m in M) (b) Now take n- 12 and M (). How many distinct subgroups does the construction in (a)...
6. Let F be a field and a Fx] a nonconstant polynomial. Denote (that is, (a(x)) is the set of all polynomials in Flr] which are divisble by a()). Then (a) Prove that (a(x)) is a subgroup of the abelian group (Flx],. (b) consider the operation on F[r]/(a()) given by Prove that this operation is well-defined. (c) Prove that the quotient F]/(a(x) is a commutative ing with identity (d) What happens if the polynoial a() is constant?
6. Let F...
8.4 14 *9. Suppose that we are using an T-chart with subgroups of size n - 5 in an idealized setting in which the data is Normally distributed with known mean μ and standard deviation σ. We know that σ,-sd(X)-4. Use also the facts that and Assume that the process is under control and that subgroups are indepen- dent. Suppose that 100 subgroup means are plotted onto the chart over the course of a day. (a) What is the probability...
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