Mathematics, 01.02.2021 07:00 yoboi33
Let X be a topological space and let C and U be subsets of X. Define C to be closed if C contains all its limit points and define U to be open if every point p β U has a neighborhood which is contained in U. Assuming these definitions show that the following statements are equivalent for a subset S of X. i) S is closed in X; ii) X β S is open in X; iii) S = [S].
Answers: 1
Mathematics, 21.06.2019 15:00
Adifferent website gives the cost for the first train as Β£56.88 and the second train as Β£20.11 with a Β£9.50 charge for cycle storage for the whole trip. how much would the journey cost you?
Answers: 2
Mathematics, 21.06.2019 17:00
Asays "we are both knaves" and b says nothing. exercises 24β31 relate to inhabitants of an island on which there are three kinds of people: knights who always tell the truth, knaves who always lie, and spies (called normals by smullyan [sm78]) who can either lie or tell the truth. you encounter three people, a, b, and c. you know one of these people is a knight, one is a knave, and one is a spy. each of the three people knows the type of person each of other two is. for each of these situations, if possible, determine whether there is a unique solution and determine who the knave, knight, and spy are. when there is no unique solution, list all possible solutions or state that there are no solutions. 24. a says "c is the knave," b says, "a is the knight," and c says "i am the spy."
Answers: 2
Mathematics, 21.06.2019 22:30
5, 6, 10 question: a. determine whether the side lengths form a triangle. (explain your reasoning) b. if it is a triangle, determine whether it is a right, acute, or obtuse triangle. (show your work)
Answers: 1
Mathematics, 22.06.2019 04:30
If a and b are real numbers, then |a-b| is always, sometimes or never equal to |b-a| ?
Answers: 1
Let X be a topological space and let C and U be subsets of X. Define C to be closed if C contains al...
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