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If I clearly understand, anyone who has a wifi access point can get connection history of any device that connect to it. You have misunderstood. This article discusses companies that essentially run WiFi "as a service" for multiple clients (e.g. KFC restaurants, as mentioned in the article). These routers run common software and are manged by the same ...


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I just tried the following algorithm for 3D distances (and therefore, it should work as well for 2D distances). It is not an exact model, but an iterative one that gets very close to the true answer after only something like 10 iterations. I haven't tested its performance against an exact approach, and so, as far as I know, it could be less performant than ...


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In this case, every circle intersects all the other circles and so we can determine the intersection points this way: First determine all n*(n-1) intersection points. Call the set of these intersection point I. Take a list of points T which contains the innermost points. Then for each point p in I, check if p is inside every circle. If p is inside every ...


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