Show that if Y is a subspace of X, and A is a subset of Y,...

Show that if Y is a subspace of X, and A is a subset of Y, then the subspace topology on A as a subspace of Y is the same as the subspace topology on A as a subspace of X.

Expert Solution

Colby Messinger answered 2 years ago

If X is any topological space, a subset A ⊆ X is compact (in the subspace...

If X is any topological space, a subset A ⊆ X is compact (in the subspace topology) if and only if every cover of A by open subsets of X has a finite subcover.

a. Prove that y=sin(x) is a subspace of R^2 b. Prove that a set of 2x2...

a. Prove that y=sin(x) is a subspace of R^2 b. Prove that a set of 2x2 non invertible matrices a subspace of all 2x2 matrices

Let S be the two dimensional subspace of R^4 spanned by x = (1,0,2,1) and y...

Let S be the two dimensional subspace of R^4 spanned by x = (1,0,2,1) and y = (0,1,- 2,0) Find a basis for S^⊥

Find five positive natural numbers u, v, w, x, y such that there is no subset...

Find five positive natural numbers u, v, w, x, y such that there is no subset with a sum divisible by 5

Suppose x,y ∈ R and assume that x < y. Show that for all z ∈...

Suppose x,y ∈ R and assume that x < y. Show that for all z ∈ (x,y), there exists α ∈ (0,1) so that αx+(1−α)y = z. Now, also prove that a set X ⊆ R is convex if and only if the set X satisfies the property that for all x,y ∈ X, with x < y, for all z ∈ (x,y), z ∈ X.

Show that if (x,y,z) is a primitive Pythagorean triple, then X and Y cannot both be...

Show that if (x,y,z) is a primitive Pythagorean triple, then X and Y cannot both be even and cannot both be odd. Hint: for the odd case, assume that there exists a primitive Pythagorean triple with X and Y both odd. Then use the proposition "A perfect square always leaves a remainder r=0 or r=1 when divided by 4." to produce a contradiction.

PART A: Suppose X and Y are independent. Show that H(X|Y) = H(X) . (H represents...

PART A: Suppose X and Y are independent. Show that H(X|Y) = H(X) . (H represents entropy i think) PART B: Suppose X and Y are independent. Show that H(X,Y) = H(X) + H(Y) PART C: Prove that the mutual information is symmetric, i.e., I(X,Y) = I(Y,X) and xi∈X, yi∈Y

Let X, Y be independent exponential random variables with mean one. Show that X/(X + Y...

Let X, Y be independent exponential random variables with mean one. Show that X/(X + Y ) is uniformly distributed on [0, 1]. (Please solve it with clear explanations so that I can learn it. I will give thumbs up.)

Q1 (a) If k(x,y) and l(x,y) are 2 utility functions and are quasiconcave then show m(x,y)=min...

Q1 (a) If k(x,y) and l(x,y) are 2 utility functions and are quasiconcave then show m(x,y)=min (k(x,y,),l(x,y) is also quasiconcave. (b) Show that k(x,y) is strictly quasiconcave if and only if the preference relation (>~) is strictly convex.

f(x,y)=30(1-y)^2xe^(-x/y). x>0. 0<y<1. a). show that f(y) the marginal density function of Y is a Beta...

f(x,y)=30(1-y)^2*x*e^(-x/y). x>0. 0<y<1. a). show that f(y) the marginal density function of Y is a Beta random variable with parameters alfa=3 and Beta=3. b). show that f(x|y) the conditional density function of X given Y=y is a Gamma random variable with parameters alfa=2 and beta=y. c). set up how would you find P(1<X<3|Y=.5). you do not have to do any calculations

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