![2. Let S be a set and let ~ be an equivalence relation on it. Let π denote the canonical projection, T: S → S/ ~, π(x) = [x]](http://img.homeworklib.com/images/39f593e1-aaee-43dc-a759-60c4b06acd56.png?x-oss-process=image/resize,w_560)
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only the last question plz 2. Let S be a set and let ~ be an equivalence relation on it. Let π denote the canonical proj...
probelms 9.1 9 Modular arithmetic Definition 9.1 Let S be a set. A relation R =...
probelms 9.1
9 Modular arithmetic Definition 9.1 Let S be a set. A relation R = R(,y) on S is a statement about pairs (x,y) of elements of S. For r,y ES, I is related to y notation: Ry) if R(x,y) is true. A relation Ris: Reflexive if for any I ES, R. Symmetric if for any ry ES, Ry implies y Rr. Transitive if for any r.y.ES, Ry and yRimply R. An equivalence relation is a reflexive, symmetric and...
Let S be a set and ACSxS. Show that there is a unique equivalence relation R...
Let S be a set and ACSxS. Show that there is a unique equivalence relation R on S containing A which is minimal with respect to this property, i.e. AC R and R an equivalence relation implies RCR'. R is called the equivalence relation generated by A
Let A be the set of students at GSU. Define the relation S as: x S...
Let A be the set of students at GSU. Define the relation S as: x S y ⬄ x is the same age as y. Prove that S is an equivalence relation.
The assertion, as given in the source: (Theorem 3.4.8 of Johnsonbaugh's text.) Let R be an equivalence relation on a set X. For each a in X, define [a] as (xeX | xRaj. Then the following set...
The assertion, as given in the source: (Theorem 3.4.8 of Johnsonbaugh's text.) Let R be an equivalence relation on a set X. For each a in X, define [a] as (xeX | xRaj. Then the following set is a partition of X: S={[a] l a eX). Logical structure of the assertion: Proof framework, based on this logical structure: Previous resulis needed (give one to three previous resulis that are most important for this prooj): Interesting or unexpected tricks, or summary:...
2. Let S 11,2,3,4,5, 6, 7,8,91 and let T 12,4,6,8. Let R be the relation on P (S) detined by for ...
2. Let S 11,2,3,4,5, 6, 7,8,91 and let T 12,4,6,8. Let R be the relation on P (S) detined by for all X, Y E P (s), (X, Y) E R if and only if IX-T] = IY-T]. (a) Prove that R is an equivalence relation. (b) How many equivalence classes are there? Explain. (c) How mauy elements of [ø], the equivalence class of ø, are there? Explain (d) How many elements of [f1,2,3, 4)], the equivalence class of (1,2,3,...
Please answer all parts. Thank you! 20. Let R be a commutative ring with identity. We define a multiplicative subset of R to be a subset S such that 1 S and ab S if a, b E S. Define a relation ~ on R...
Please answer all parts. Thank you!
20. Let R be a commutative ring with identity. We define a multiplicative subset of R to be a subset S such that 1 S and ab S if a, b E S. Define a relation ~ on R × S by (a, s) ~ (a, s') if there exists an s"e S such that s* (s,a-sa,) a. 0. Show that ~ is an equivalence relation on b. Let a/s denote the equivalence class...
2. [2+9+6=17] Let X be a nonempty set. Two metrics d and d on X are...
2. [2+9+6=17] Let X be a nonempty set. Two metrics d and d on X are said to be uniformly equivalent if the identity map from (X, d) to (X, d) a nd its in- verse are uniformly continuous. (a) Prove that uniform equivalence is indeed an equivalence relation on the class of metrics on X. (b) Let (X,d) and (x, ) be uniformly equivalent. Are the following true or false? (i) If (X, d) is bounded, then must also...
Question 8 Let R be relation on a set A. 1. When is R said to...
Question 8
Let R be relation on a set A. 1. When is R said to be an equivalence relation? Give a precise definition, using appropriate quantifiers etc. 2. When is R said to be an partial order? Give a precise definition, using appropriate quantifiers etc (You don't need to redefine things that you defined in the previous part... you may simply mention them to save time.) 3. On Z, define a relation: a D biff a - b is...
5. (6 marks) Let S be the set of all binary strings of length 6. Consider the relation ρ on the set S in which for all a,b ∈ S, (a,b) ∈ ρ if and only if the length of a longest substring of consecutiv...
5. (6 marks) Let S be the set of all binary strings of length 6. Consider the relation ρ on the set S in which for all a,b ∈ S, (a,b) ∈ ρ if and only if the length of a longest substring of consecutive ones in a is the same as the length of a longest substring of consecutive ones in b. (a) Is 011010 related to 000011? Explain why or why not. (b) Prove that ρ is an...
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...
probelms 9.1
9 Modular arithmetic Definition 9.1 Let S be a set. A relation R = R(,y) on S is a statement about pairs (x,y) of elements of S. For r,y ES, I is related to y notation: Ry) if R(x,y) is true. A relation Ris: Reflexive if for any I ES, R. Symmetric if for any ry ES, Ry implies y Rr. Transitive if for any r.y.ES, Ry and yRimply R. An equivalence relation is a reflexive, symmetric and...
Let S be a set and ACSxS. Show that there is a unique equivalence relation R on S containing A which is minimal with respect to this property, i.e. AC R and R an equivalence relation implies RCR'. R is called the equivalence relation generated by A
The assertion, as given in the source: (Theorem 3.4.8 of Johnsonbaugh's text.) Let R be an equivalence relation on a set X. For each a in X, define [a] as (xeX | xRaj. Then the following set is a partition of X: S={[a] l a eX). Logical structure of the assertion: Proof framework, based on this logical structure: Previous resulis needed (give one to three previous resulis that are most important for this prooj): Interesting or unexpected tricks, or summary:...
2. Let S 11,2,3,4,5, 6, 7,8,91 and let T 12,4,6,8. Let R be the relation on P (S) detined by for all X, Y E P (s), (X, Y) E R if and only if IX-T] = IY-T]. (a) Prove that R is an equivalence relation. (b) How many equivalence classes are there? Explain. (c) How mauy elements of [ø], the equivalence class of ø, are there? Explain (d) How many elements of [f1,2,3, 4)], the equivalence class of (1,2,3,...
Please answer all parts. Thank you!
20. Let R be a commutative ring with identity. We define a multiplicative subset of R to be a subset S such that 1 S and ab S if a, b E S. Define a relation ~ on R × S by (a, s) ~ (a, s') if there exists an s"e S such that s* (s,a-sa,) a. 0. Show that ~ is an equivalence relation on b. Let a/s denote the equivalence class...
2. [2+9+6=17] Let X be a nonempty set. Two metrics d and d on X are said to be uniformly equivalent if the identity map from (X, d) to (X, d) a nd its in- verse are uniformly continuous. (a) Prove that uniform equivalence is indeed an equivalence relation on the class of metrics on X. (b) Let (X,d) and (x, ) be uniformly equivalent. Are the following true or false? (i) If (X, d) is bounded, then must also...
Question 8
Let R be relation on a set A. 1. When is R said to be an equivalence relation? Give a precise definition, using appropriate quantifiers etc. 2. When is R said to be an partial order? Give a precise definition, using appropriate quantifiers etc (You don't need to redefine things that you defined in the previous part... you may simply mention them to save time.) 3. On Z, define a relation: a D biff a - b is...
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...
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