Topology
2nd Edition
ISBN: 9780134689517
Author: Munkres, James R.
Publisher: Pearson,
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Textbook Question
Chapter 1.1, Problem 4.3E
Let A and B be sets of real numbers. Write the negation of each of the following statements:
For every
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Solve the linear system of equations attached using Gaussian elimination (not Gauss-Jordan) and back subsitution.
Remember that:
A matrix is in row echelon form if
Any row that consists only of zeros is at the bottom of the matrix.
The first non-zero entry in each other row is 1. This entry is called aleading 1.
The leading 1 of each row, after the first row, lies to the right of the leading 1 of the previous row.
Chapter 1 Solutions
Topology
Ch. 1.1 - Check the distributive laws for and and De Morgans...Ch. 1.1 - Determine which of the following statements are...Ch. 1.1 - Determine which of the following statements are...Ch. 1.1 - Determine which of the following statements are...Ch. 1.1 - Determine which of the following statements are...Ch. 1.1 - Determine which of the following statements are...Ch. 1.1 - Determine which of the following statements are...Ch. 1.1 - Determine which of the following statements are...Ch. 1.1 - Determine which of the following statements are...Ch. 1.1 - Determine which of the following statements are...
Ch. 1.1 - Determine which of the following statements are...Ch. 1.1 - Prob. 2.11ECh. 1.1 - Determine which of the following statements are...Ch. 1.1 - Determine which of the following statements are...Ch. 1.1 - Determine which of the following statements are...Ch. 1.1 - Determine which of the following statements are...Ch. 1.1 - Determine which of the following statements are...Ch. 1.1 - Determine which of the following statements are...Ch. 1.1 - Write the contrapositive and converse of the...Ch. 1.1 - Do the same for the statement If x0, then x2x0.Ch. 1.1 - Let A and B be sets of real numbers. Write the...Ch. 1.1 - Let A and B be sets of real numbers. Write the...Ch. 1.1 - Let A and B be sets of real numbers. Write the...Ch. 1.1 - Let A and B be sets of real numbers. Write the...Ch. 1.1 - Let A be a nonempty collection of sets. Determine...Ch. 1.1 - Write the contrapositive of each of the statements...Ch. 1.1 - Write the contrapositive of each of the statements...Ch. 1.1 - Write the contrapositive of each of the statements...Ch. 1.1 - Write the contrapositive of each of the statements...Ch. 1.1 - Prob. 7ECh. 1.1 - Prob. 8ECh. 1.1 - Formulate and prove DeMorgans laws for arbitrary...Ch. 1.1 - Let denote the set of real numbers. For each of...Ch. 1.1 - Let denote the set of real numbers. For each of...Ch. 1.1 - Let denote the set of real numbers. For each of...Ch. 1.1 - Let denote the set of real numbers. For each of...Ch. 1.1 - Let denote the set of real numbers. For each of...Ch. 1.2 - Let f:AB. Let A0AandB0B. Show that A0f1(f(A0)) and...Ch. 1.2 - Prob. 1.2ECh. 1.2 - Let f:AB and let AiAandBiBfori=0andi=1. Show that...Ch. 1.2 - Let f:AB and let AiAandBiBfori=0andi=1. Show that...Ch. 1.2 - Let f:AB and let AiAandBiBfori=0andi=1. Show that...Ch. 1.2 - Let f:AB and let AiAandBiBfori=0andi=1. Show that...Ch. 1.2 - Prob. 2.5ECh. 1.2 - Let f:AB and let AiAandBiBfori=0andi=1. Show that...Ch. 1.2 - Let f:AB and let AiAandBiBfori=0andi=1. Show that...Ch. 1.2 - Let f:AB and let AiAandBiBfori=0andi=1. Show that...Ch. 1.2 - Show that b, c, f, and g of Exercise 2 hold for...Ch. 1.2 - Show that b, c, f, and g of Exercise 2 hold for...Ch. 1.2 - Show that b, c, f, and g of Exercise 2 hold for...Ch. 1.2 - Show that b, c, f, and g of Exercise 2 hold for...Ch. 1.2 - Let f:AB and g:BC. If C0C, show that...Ch. 1.2 - Let f:AB and g:BC. If f and g are injective, show...Ch. 1.2 - Let f:AB and g:BC. If gf is injective, what can...Ch. 1.2 - Let f:AB and g:BC. If f and g are surjective, show...Ch. 1.2 - Let f:AB and g:BC. If gf is surjective, what can...Ch. 1.2 - Let f:AB and g:BC. Summarize your answers to b-e...Ch. 1.2 - In general, let us denote the identity function...Ch. 1.2 - In general, let us denote the identity function...Ch. 1.2 - In general, let us denote the identity function...Ch. 1.2 - In general, let us denote the identity function...Ch. 1.2 - In general, let us denote the identity function...Ch. 1.2 - Let f: be the function f(x)=x3x. By restricting...Ch. 1.3 - Define two points (x0,y0) and (x1,y1) of the plane...Ch. 1.3 - Let C be a relation on a set A. If A0A, define the...Ch. 1.3 - Here is a proof that every relation C that is both...Ch. 1.3 - Let f:AB be a surjective function. Let us define a...Ch. 1.3 - Let f:AB be a surjective function. Let us define a...Ch. 1.3 - Let S and S be the following subsets of the plane:...Ch. 1.3 - Let S and S be the following subsets of the plane:...Ch. 1.3 - Let S and S be the following subsets of the plane:...Ch. 1.3 - Define a relation on the plane by setting...Ch. 1.3 - Show that the restriction of an order relation is...Ch. 1.3 - Check that the relation defined in Example 7 is an...Ch. 1.3 - Check that the dictionary order is an order...Ch. 1.3 - a Show that the map f:(1,1) of Example 9 is order...Ch. 1.3 - Prob. 10.2ECh. 1.3 - Prob. 11ECh. 1.3 - Prob. 12ECh. 1.3 - Prove the following: Theorem. If an ordered set A...Ch. 1.3 - If C is a relation on a set A, define a new...Ch. 1.3 - Assume that the real line has the least upper...Ch. 1.4 - Prove the following laws of algebra for , using...Ch. 1.4 - Prove the following laws of algebra for , using...Ch. 1.4 - Prob. 1.3ECh. 1.4 - Prob. 1.4ECh. 1.4 - Prob. 1.5ECh. 1.4 - Prob. 1.6ECh. 1.4 - Prove the following laws of algebra for , using...Ch. 1.4 - Prove the following laws of algebra for , using...Ch. 1.4 - Prob. 1.9ECh. 1.4 - Prob. 1.10ECh. 1.4 - Prob. 1.11ECh. 1.4 - Prob. 1.12ECh. 1.4 - Prob. 1.13ECh. 1.4 - Prob. 1.14ECh. 1.4 - Prob. 1.15ECh. 1.4 - Prob. 1.16ECh. 1.4 - Prove the following laws of algebra for , using...Ch. 1.4 - Prob. 1.18ECh. 1.4 - Prob. 1.19ECh. 1.4 - Prob. 1.20ECh. 1.4 - Prob. 2.1ECh. 1.4 - Prob. 2.2ECh. 1.4 - Prob. 2.3ECh. 1.4 - Prob. 2.4ECh. 1.4 - Prob. 2.5ECh. 1.4 - Prob. 2.6ECh. 1.4 - Prob. 2.7ECh. 1.4 - Prob. 2.8ECh. 1.4 - Prob. 2.9ECh. 1.4 - Prob. 2.10ECh. 1.4 - Prob. 2.11ECh. 1.4 - Prob. 3ECh. 1.4 - Prob. 4.1ECh. 1.4 - Prob. 4.2ECh. 1.4 - Prove the following properties of and+: a...Ch. 1.4 - Prob. 6ECh. 1.4 - Prob. 7ECh. 1.4 - Prob. 8.1ECh. 1.4 - Prob. 8.2ECh. 1.4 - Prob. 8.3ECh. 1.4 - a Show that every nonempty subset of that is...Ch. 1.4 - Prob. 10.1ECh. 1.4 - Prob. 10.2ECh. 1.4 - Prob. 10.3ECh. 1.4 - Prob. 10.4ECh. 1.4 - Prob. 11.1ECh. 1.4 - Prob. 11.2ECh. 1.4 - Prob. 11.3ECh. 1.4 - Prob. 11.4ECh. 1.5 - Show there is a bijective correspondence of AB...Ch. 1.5 - a Show that if n1 there is bijective...Ch. 1.5 - b Given the indexed family {A1,A2,}, let...Ch. 1.5 - Let A=A1A2 and B=B1B2. a Show that if BiAi for all...Ch. 1.5 - Let A=A1A2 and B=B1B2. b Show the converse of a...Ch. 1.5 - Let A=A1A2 and B=B1B2. c Show that if A is...Ch. 1.5 - Prob. 3.4ECh. 1.5 - Let m,n+. Let X. a If mn, find an injective map...Ch. 1.5 - Let m,n+. Let X. b Find a bijective map...Ch. 1.5 - Let m,n+. Let X. c Find an injective map h:XnX.Ch. 1.5 - Let m,n+. Let X. d Find a bijective map k:XnXX.Ch. 1.5 - Prob. 4.5ECh. 1.5 - Prob. 4.6ECh. 1.5 - Which of the following subsets of can be...Ch. 1.6 - a Make a list of all the injective maps...Ch. 1.6 - Prob. 2ECh. 1.6 - Prob. 3ECh. 1.6 - Prob. 4.1ECh. 1.6 - Prob. 4.2ECh. 1.6 - If AB is finite, does it follow that A and B are...Ch. 1.6 - a Let A={1,,n}. Show there is a bijection of P(A)...Ch. 1.6 - b Show that if A is finite, then P(A) is finite.Ch. 1.6 - Prob. 7ECh. 1.7 - Show that is countably infinite.Ch. 1.7 - Show that the maps f and g of Examples 1 and 2 are...Ch. 1.7 - Prob. 3ECh. 1.7 - a A real number x is said to be algebraic over the...Ch. 1.7 - Determine, for each of the following sets, whether...Ch. 1.7 - Determine, for each of the following sets, whether...Ch. 1.7 - Determine, for each of the following sets, whether...Ch. 1.7 - Determine, for each of the following sets, whether...Ch. 1.7 - Determine, for each of the following sets, whether...Ch. 1.7 - Determine, for each of the following sets, whether...Ch. 1.7 - Determine, for each of the following sets, whether...Ch. 1.7 - Determine, for each of the following sets, whether...Ch. 1.7 - Prob. 5.9ECh. 1.7 - Prob. 5.10ECh. 1.7 - We say that two sets A and B have the same...Ch. 1.7 - We say that two sets A and B have the same...Ch. 1.7 - Show that the sets D and E of Exercise 5 have the...Ch. 1.7 - Let X denote the two-element set {0,1}; let B be...Ch. 1.7 - a The formula...Ch. 1.8 - Prob. 1ECh. 1.8 - Prob. 2ECh. 1.8 - Prob. 3ECh. 1.8 - Prob. 4ECh. 1.8 - Prob. 5ECh. 1.8 - Prob. 6ECh. 1.8 - Prob. 7ECh. 1.8 - Prob. 8ECh. 1.9 - Define an injective map f:+X, where X is the...Ch. 1.9 - Prob. 2ECh. 1.9 - Prob. 3ECh. 1.9 - There was a theorem in 7 whose proof involved an...Ch. 1.9 - a Use the choice axiom to show that if f:AB is...Ch. 1.9 - Let A and B be two nonempty sets. If there is an...Ch. 1.9 - Prob. 8ECh. 1.10 - Prob. 1ECh. 1.10 - Both {1,2}+ and +{1,2} are well-ordered in the...Ch. 1.10 - a Let denote the set of negative integers in the...Ch. 1.10 - Show the well-ordering theorem implies the choice...Ch. 1.10 - Prob. 6ECh. 1.10 - a Let A1 and A2 be disjoint sets, well-ordered by...Ch. 1.10 - Let A and B be two sets. Using the well-ordering...
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