14&15 13 Let o be a permutation of a set A. We shall say "o moves...
Let X be a finite set on which G acts, let ρ be the corresponding permutation representation [cf. 1.2, example (c)], and xx be the character of p. Let s E G; show that xx(s) is the number of elements of X fixed by s.
Let X be a finite set on which G acts, let ρ be the corresponding permutation representation [cf. 1.2, example (c)], and xx be the character of p. Let s E G; show that xx(s)...
1, and let σ be a permutation of {1, , n). Recall that for each integer m a) Let n 1, we denote ơm--σ ο . . . o σ. Show that n times b) Let 21, and let be a permutation of..,n consisting of a unique cycle of length n. Deduce from the previous question that there exists i e (1,..., n) such that i +c() )+22(n1).
1, and let σ be a permutation of {1, , n). Recall...
1. Show that the set of rational numbers of the form m /n, where m, n E Z and n is odd is a subgroup of QQ under addition. 2. Let H, K be subgroups of a group G. Prove: H n K is a subgroup of G 3. Let G be an abelian group. Let S-aEG o(a) is finite . Show that S is a subgroup of G 4. What is the largest order of a permutation in S10?...
4. List all left cosets of An in Sn. (See 3.7.11.) For a given permutation o in Sn, how can you tell from o which coset o An is? Example 3.7.11. Pick a positive integer n > 2 and consider the group S. We define An = {o ESO is an even permutation). We will use the first theorem above to verify that An is a subgroup of S First of all, the identity is defined to be an even...
13 14
Exercise 13: Let (xn) be a bounded sequence a S be the set of limit points of (n), i.e. S:{xER there exists a subsequence () s.t. lim } ko0 Show lim inf inf S n-o0 Hint: See lecture for proof lim sup Exercise 14: (Caesaro revisited) Let (x) be a convergent sequence. Let (yn) be the sequence given by Yn= n for all n E N. Show that lim sup y lim sup n n-+00 n o0
b+c
ced in a 4x4 grid, as shown below left. A 12. Consider a puzzle consisting of fifteen numbered squares pla move consists of sliding a numbered square into the adjacent unoccupied square. 13 9 10 11 12 13 1514 13 1415 If we treat the unoccupied square as numbered 16, every configuration corresponds to a permutation in S16. For example, the initial configuration on the left corresponds to the identity, while the configuration in the middle corresponds to the...
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...
Let U - (7, , 9, 10, 11, 12, 13, 14, 15, 16), A = 17, 9, 11, 13, 15), 8 - (8, 10, 12, 14, 16), and C - {7, 8, 10, 11, 14, 15). List the elements of each set. (Enter your answers using roster notation. Enter EMPTY or for the empty set.) (a) Anonc (b) (AU B9) (c) (c) (A Uncs
10. Let [n] be an element in Zp, p prime. We say [n] is perfect provided [o (n)] [2n]. Show that d-[21,where Idy]-'is the multiplicative inverse of ld in Z, [dkl In
10. Let [n] be an element in Zp, p prime. We say [n] is perfect provided [o (n)] [2n]. Show that d-[21,where Idy]-'is the multiplicative inverse of ld in Z, [dkl In
Let U - (7, 8, 9, 10, 11, 12, 13, 14, 15, 16). A - 17, 9, 11, 13, 15), B = {8, 10, 12, 14, 16), and C (7, 8, 10, 11, 14, 15). List the elements of each set. (Enter your answers using roster notation Enter EMPTY or for the empty set.) (a) Anonco (6) AU BUBNC (c) (A U BY C