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LMKIYHAQ
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Homework Statement
Let d be the usual metric on RxR and let p be the taxicab metric on RxR. Prove that the topology of d = the topology of p.
Homework Equations
The Attempt at a Solution
I am trying to show that the open ball around point (x,y) with E/2 as the radius (in topology d) is a subset of the open ball around point (x,y) with E as the radius (in topology p), which is a subset of the open ball around point(x,y) with E as the radius (in topology d).
I have chosen point (a,b) and assumed it is in the usual metric. I have tried to show then that the point in the taxi-cab metric is less than E, using the usual metric's distance formula less than E/2. I have done some algebra to see that l x-a l + l y-b l < [tex]E^{2}[/tex]. I am not sure how to go from here since I need to show l x-a l + l y-b l < E? Once I get the inequality less than E, then do I show[tex]\sqrt{(x-a)^{2} +(y-b)^{2}}[/tex] < E?
Thanks for the help.