Topology
Topology
2nd Edition
ISBN: 9780134689517
Author: Munkres, James R.
Publisher: Pearson,
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Chapter 2.17, Problem 5E

Let X be an ordered set in the order topology. Show that ( a , b ) ¯ ⊂ [ a , b ] . Under what conditions does equality hold?

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Chapter 2 Solutions

Topology

Ch. 2.13 - Prob. 1ECh. 2.13 - Consider the nine topologies on the set X=a,b,c...Ch. 2.13 - Show that the collection Tc given in Example 4 of...Ch. 2.13 - a If {T} is a family of topologies on X, show that...Ch. 2.13 - Show that if A is a basis for a topology on X,...Ch. 2.13 - Show that the topologies of l and K are not...Ch. 2.13 - Consider the following topologies on : T1 = the...Ch. 2.13 - a Apply Lemma 13.2 to show that the countable...Ch. 2.16 - Show that if Y is a subspace of X, and A is a...Ch. 2.16 - If and are topologies on X and is strictly...
Ch. 2.16 - Consider the set Y=[1,1] as a subspace of .Which...Ch. 2.16 - A map f:XY is said to be an open map if for every...Ch. 2.16 - Let X and X denote a single set in the topologies ...Ch. 2.16 - Exercises Show that the countable collection...Ch. 2.16 - Prob. 7ECh. 2.16 - Exercises If L is a straight line in the plane,...Ch. 2.16 - Exercises Show that the dictionary order topology...Ch. 2.16 - Exercises Let I=[0,1]. Compare the product...Ch. 2.17 - Let C be a collection of subsets of the set X....Ch. 2.17 - Show that if A is closed in Y and Y is closed in...Ch. 2.17 - Show that if A is closed in X and B is closed in...Ch. 2.17 - Show that if U is open in X and A is closed in X,...Ch. 2.17 - Let X be an ordered set in the order topology....Ch. 2.17 - Prob. 6.1ECh. 2.17 - Prob. 6.2ECh. 2.17 - Let A, B, and A denote subsets of a space X. Prove...Ch. 2.17 - Prob. 7ECh. 2.17 - Let A, B, and A denote subsets of a space X....Ch. 2.17 - Let A, B, and A denote subsets of a space X....Ch. 2.17 - Let A, B, and A denote subsets of a space X....Ch. 2.17 - Let AX and BY. Show that in the space XY, AB=AB.Ch. 2.17 - Show that every order topology is Hausdorff.Ch. 2.17 - Show that the product of two Hausdorff spaces is...Ch. 2.17 - Show that a subspace of a Hausdorff space is...Ch. 2.17 - Show that X is Hausdorff if and only if the...Ch. 2.17 - Prob. 14ECh. 2.17 - Show the T1 axiom is equivalent to the condition...Ch. 2.17 - Prob. 16.1ECh. 2.17 - Consider the five topologies on given in Exercise...Ch. 2.17 - Consider the lower limit topology on and the...Ch. 2.17 - Prob. 19ECh. 2.18 - Prove that for functions f:, the definition of...Ch. 2.18 - Prob. 2ECh. 2.18 - Let X and X denote a single set in the two...Ch. 2.18 - Let X and X denote a single set in the two...Ch. 2.18 - Given x0X and y0Y, show that the maps f:XXY and...Ch. 2.18 - Show that subspace (a,b) of is homeomorphic with...Ch. 2.18 - Prob. 6ECh. 2.18 - (a) Suppose that f: is continuous from the right,...Ch. 2.18 - Let Y be an ordered set in the order topology. Let...Ch. 2.18 - Let {A} be a collection of subsets of X; let X=A....Ch. 2.18 - Let f:AB and g:CD be continuous functions. Let us...Ch. 2.18 - Prob. 11ECh. 2.19 - Prove Theorem 19.2. Theorem 19.2. Suppose the...Ch. 2.19 - Prove Theorem 19.3. Theorem 19.3. Let A be a...Ch. 2.19 - Prove Theorem 19.4. Theorem 19.4. If each space X...Ch. 2.19 - Show that (X1Xn1)Xn is homeomorphic with X1Xn.Ch. 2.19 - One of the implications stated in Theorem 19.6...Ch. 2.19 - Let be the subset of consisting of all sequences...Ch. 2.19 - Given sequences (a1,a2,...) and (b1,b2,...) of...Ch. 2.19 - Show that the choice axiom is equivalent to the...
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