3.12 (c),(d),(f) Suppose S is a subspace of the topological space X. (c) If (p.) is a sequence of points in S and pe S, then p →p in S if a (d) Every subspace of a Hausdorff space is Hausdorff.
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- In which of the following examples is the set U not a subspace of the space V?If X is the subspace of `∞ consisting of all sequences of zeros andones, what is the induced metric on X ?Suppose X is a topological space whose topology is coherent with a family B of subspaces. Prove that if Y is another topological space, then a map f : X → Y is continuous if and only if f|B is continuous for every B ∈ B, where f|B is the restriction of f to B.
- 4. Consider the following subspaces of P. H = Span{1+t, 1-t 3 } and G = Span{1+t+t 2, t – t 3, 1+t+t 3} Find dim H, dim G and dim H intersection G.4. Consider the following subspaces of P.H = Span{1 + t, 1 − t3} and G = Span{1 + t + t2, t − t3, 1 + t + t3}Find dim H, dim G and dim H ∩ G.9. Show that P2 (polynomials of degree ≤ 2) is a subspace of P3 (polynomials of degree ≤ 3).
- If X is an arbitrary topological space, then we have the following: (a) each point in X is contained in exactly one component of X, (b) each connected subspace of X is contained in a component of X,Find a basis for the subspace of R3 spanned by S.S = {(4, 4, 8), (1, 1, 2), (1, 1, 1)}Is the set M={1/n | n ε z+} compact as a subspace of R?
- Suppose that S1 and S2 are subspaces of a vector space (V, F). Show that their intersection S1 ∩ S2 is also a subspace of (V, F). Is their union S1 ∪ S2 always a subspace?Find a basis for the subspace of R3 spanned by S. S = {(5, 9, 9), (1, 2, 2), (1, 1, 1)}1-Suppose that S1and S2are nonzero subspaces, with S1 contained inside S2, and suppose that dim(S2)=3(a) What are the possible dimensions of S1? (b) If S1≠S2then what are the possible dimensions of S1? 2-Find the dimensions of the following linear spaces. (a) ℝ4×2(b) P3(c) The space of all diagonal 6×6 3-Find a basis {p(x),q(x)} for the vector space {f(x)∈P2[x]∣f′(4)=f(1)}where P2[x] is the vector space of polynomials in xx with degree at most 2. You can enter polynomials using notation e.g., 5+3xx for 5+3x^2p(x) , q(x)= 4-A square matrix is half-magic if the sum of the numbers in each row and column is the same. Find a basis BB for the vector space of 2×2 half-magic squares. B=