(1) Determine if each of the following statements is true(T) or false(F). 1- In a metric space, every open ball is an open set. 2- For any set A in a metric space, A naA° # ¢ 3- Let X, Y are metric spaces and f: X Y is continuous map then

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter8: Polynomials
Section8.1: Polynomials Over A Ring
Problem 20E: Consider the mapping :Z[ x ]Zk[ x ] defined by (a0+a1x++anxn)=[ a0 ]+[ a1 ]x++[ an ]xn, where [ ai ]...
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(1) Determine if each of the following statements is true(T) or false(F).
1- In a metric space, every open ball is an open set.
2- For any set A in a metric space, ANJA # 6
3- Let X, Y are metric spaces and f : X →Y is continuous map then
for any open set A in X, f(A) is open in Y.
4- For any closed subset A of a metric space, A' C A
5- In a metric space, the intersection of any family of open sets is open.
6- For any subset A of a metric space, (A°)° C A°.
7- In R with the usual metric, R+ has only one lower bound.
8- Let X, Y are metric spaces and f: X → Y .If for any A C X,
f(A) C f(A) then f is continuous.
9- For any closed set A in a metric space,
A = A.
10- In any complete metric space, every Caushy sequence is convergent.
Transcribed Image Text:(1) Determine if each of the following statements is true(T) or false(F). 1- In a metric space, every open ball is an open set. 2- For any set A in a metric space, ANJA # 6 3- Let X, Y are metric spaces and f : X →Y is continuous map then for any open set A in X, f(A) is open in Y. 4- For any closed subset A of a metric space, A' C A 5- In a metric space, the intersection of any family of open sets is open. 6- For any subset A of a metric space, (A°)° C A°. 7- In R with the usual metric, R+ has only one lower bound. 8- Let X, Y are metric spaces and f: X → Y .If for any A C X, f(A) C f(A) then f is continuous. 9- For any closed set A in a metric space, A = A. 10- In any complete metric space, every Caushy sequence is convergent.
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