2. Consider morphisms f: A → B, g: BC, h: CD, k: DB, j: BC, t: A → C in a category C so that g is an isomorphism, and all of them satisfy the following equations: koh=g¹, gof=l, ho(jof)=hol. Y Draw a digram showing all the functions. (Place the objects A, B,... first and then the morphisms connecting them. You can play around with the positions of the objects, so that the diagram looks pleasing.) (b) Prove that jof=gof. Justify your computations by specifying which property you use at every step. (c) Deduce that if f is an epimorphism, then j = g.

Q: ) Let R = {(a,b) : 3keza = k * b} be a relation over the positive integers. Prove or disprove that R…

A: Given that R=(a,b):a=k*b To show reflexive it is enough to show that a~a. It is true because, a=1*a.…

Q: 1. Give an example of a set S with a relation ~ on S such that ~ is symmetric and transitive but not…

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Q: The relation R defined on a set A is antisymmetric if (a, b) ER = (b, a) E R for (A) Every (a, b) ER…

A: A relation R is said to be antisymmetric if (a,b)∈R and (b,a)∈R implies a=b

Q: Let R be a relation on the set A = {0, 1, 4, 8} defined by xRy if and only if x + y < 8. (i) List…

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Q: 2. If f: A B is an equivalence in a category e and g : B A is the morphism such that gof= 14, fo g =…

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Q: Dijec not need to prove you function is a bijection): (a) N and Z (b) Rand (1, ∞) (c) (0, 2) and (3,…

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Q: In the set A = {1,2, 3, 4} is defined a relation R by ? = {(1,1), (1,3), (3, 4), (4, 3)}. ndicate…

A: Given A = {1, 2, 3, 4} R = {(1, 1), (1, 3), (3, 4), (4, 3)}

Q: 4. Let A = {1,2, 3, 4, 5} and let S = P(A), the power set of A. For a, b e S, define aRb if a b. (a)…

A: A relation R defined on a set A is said to be an equivalence relation if the relation R is…

Q: Let f: A --> B and g: B --> C be maps. Show that if g of f is 1-1 and onto, then f is 1-1 and g is…

A: According to the given information,

Q: C. Let T be defined onN N by (a, b)T (c, d) if and only if a c and b 2 d. Write down the full nature…

A: We will use the basic definition of reflexive, symmetric, antisymmetric and transitive realtion.

Q: Let A = {1, 2, 3}. Give an example of a relation R on A such that Ris symmetric but is not…

A: We have to give an example of a relation R on A such that R is symmetric but not anti-symmetric.A =…

Q: Let f: X → Y and g : Y → Z be arbitrary maps of sets (a) Show that if f and g are injective then so…

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Q: On sets, the relation x R y given by there exists a bijective function from the set x to the set y'…

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Q: 9. Define a relation R on {-2,-1,0, 1, 2, 3, 4, 5, 6, 7} by a R b if and only if 3a+b is a multiple…

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Q: Please solve this problem. Thank you!

A: Note:R is a relation from A to B iff R ⊆ A×B.If R is the relation on a set A then R ⊆ A×A.And if (x,…

Q: 2. Define a relation R on Z as follows: a Rb if and only if 5 | (a²-b²). a) Prove that R is an…

A: A relation R on ℤ is defined by: a R b if and only if 5 | a2-b2 . We have to prove that R is an…

Q: how to prove a map is unique?

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Q: 4. Describe all Consider the relation R on R x R defined by (x1, y1) R(x2, y2) iff x₁ - 2y2 = x₂ -…

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Q: ) Let A = {1,2,3, 4} × {1,2, 3, 4}, and define a relation R on A by (1, Yı)R(x2, Y2) if r1 + y1 = x2…

A: Equivalence relation means it should satisfy reflexive, symmetric, Transitive conditions.…

Q: A relation R defined on the given set A will satisfy

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Q: 2. Let f A B be a mapping. Prove that f is bijective if and only if f(A\C) = B\ƒ(C) for all CCA.

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Q: 6. Let (a, b), (c,d) E R2. Define a relation ~on R2 by [ (a, b)~ (c,d) if |ab|=|cd| Show that is an…

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Q: 1. Let & be a connected category and hi Z→X and f Y. X= ง and g are Prove that if f ouch that f‡g,…

A: Given that:Let  be a connected category and  such that .To prove: If f and g are  constant morphisms…

Q: 8. (6 points) Define a relation R on Z as follows: For all integers m and n, m R n ⇒ (m − n)is a…

A: The objective of the question is to understand the properties of the relation R defined on the set…

Q: Reflexive. • Anti-reflexive. • Symmetric. • Anti-symmetric. Justify all your answers. Transitive. •…

A: Let's consider a few examples of elements inside the relation R, where (a,b)∈ R if and only if…

Q: Lex 172,3,4). Consider the relation R on X defined as follows. R = ((1.1), 13), (2,2), (2.4), (3,1),…

A: I have solved both subpart using basic definition of equivalence relation and equivalence class.

Q: 1. Let A = {2, 3, 4, 5, 6} and B = {10, 11, 12, 13). Define a relation R on (A x B) as follows: a Rb…

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Q: f d a h с 6.0 g e b

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Q: Let R = {(f, g) | f(1) = g(1)} be a relation defined on the set of func- tions from Z to Z. Is R an…

A: Let R be a relation on a set A. Then R is said to be an equivalence relation if it is reflexive,…