mjkato
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Got it, thank you
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The discussion focuses on the properties of metric spaces defined by the metrics d1 and d2 on R^2, specifically addressing the relationship between limit points under these metrics. It establishes that (R^2, d1) and (R^2, d2) are indeed metric spaces, as they consist of a set paired with a metric. The key conclusion is that if a point (x1, x2) is a limit point of a subset under one metric, it is also a limit point under the other metric, emphasizing the interconnectedness of these definitions in topology.
PREREQUISITESStudents and educators in mathematics, particularly those studying topology, metric spaces, and analysis, will benefit from this discussion.
d1 and d2 aren't metric spaces - they are metrics.mjkato said:Homework Statement
Let d1(x,y) = |x1 − y1| + |x2 − y2| and d2(x,y) = ((x1 − y1)^2+(x2 − y2)^2)^(1/2) be metric spaces on R^2.
How do you describe a neighborhood?mjkato said:Prove that if a point (x1,x2) is a limit point of a subset under one metric, it is a limit point in the other.
Homework Equations
The Attempt at a Solution
I'm mostly lost here- I know a limit point contains atleast one point from the set in every neighborhood, but can't figure out how to translate that into a proof of this.