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- Let (X, d) be a metric space and let A, B⊆X be such that A is connected, and A∩B ≠ ∅ and A∩ (X − B) ≠ ∅, prove that A∩∂ (B) ≠ ∅. Where ∂ (B) is the boundary of B.State true or false with a brief justification If the dual X' of a normed linear space X is fininte dimensional, then X is finite dimensionalthe euclidean space R³ is a separable metric space. true or false?
- Define what it means for a topological space to be completely regular,Let (X,d) be a metric space and d*(x,y) = d(x,y)/1+d(x,y) Prove that the family of open sets with respect to the metric d is same as the family of open sets with respect to the metric d*.Let (X, d) be a metric space and let A ⊆ X be complete. Show that A is closed.
- Let (X, T ) be a topological space, (M, d) be a complete metric space andBC(X, M) := {f ∈ C(X, M); f[X] is bounded }d∞(f, g) := sup d(f(x), g(x)) (f, g ∈ BC(X, M)).Then (BC(X, M), d∞) is a complete metric space.2. Assume that (X, dX) and (Y, dY ) are complete spaces, and give X × Y themetric d defined byd((x1, y1),(x2, y2)) = dX(x1, x2) + dY (y1, y2)Show that (X × Y, d) is complete.Show that D^2 = {(x, y) ∈ E^2: x^2+y^2 ≤ 1} ⊂ E^2 and the space containing a single point are homotopy equivalent. (E^2 represents R^2 equipped with euclidean topology)