Covering Sphere w/ Disks: Min Required Radius k

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The discussion revolves around determining the minimum number of disks required to cover a sphere, specifically when the radius of the sphere is k times that of the disks. Participants note that while the surface area of a sphere is 4πr² and that of a disk is πr², the assumption that only four disks can cover a sphere is flawed unless the disks can be distorted. A conclusion reached is that when the radius of the sphere equals the radius of the disks, four disks suffice, but for a sphere with a radius k times that of the disks, the requirement increases to 2k² disks. The conversation also touches on related mathematical concepts, such as the Riemann Sphere and potential three-dimensional complex spaces. Overall, the challenge of covering a sphere with disks raises questions about geometric manipulation and area preservation.
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What is the minimum number of disks required to perfectly cover a sphere with a radius k number of times the radius of the disks?
 
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Werg22, he said "sphere", not "ball".
 
Thanks Wergs22 and HallsofIvy,

...but I was looking for a solution more akin to the disk covering problem http://mathworld.wolfram.com/DiskCoveringProblem.html" but for a sphere rather than the complex plane extended over a sphere. Maybe if we consider the number of steradian needed to cover a sphere?

As an aside, the Riemann Sphere brings up another question... Is there a 3 dimensional complex space where the traditional complex plane has an orthogonal counterpart sharing the same Real axis?
 
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Since the Surface area of a sphere is 4*pi*r^2 and the area of a disc is pi*r^2 wouldn't you need just 4? This is assuming of course you could manipulate the shape of the discs without changing their area.
 
Hey Diffy, I came to the same conclusion for the case where the radius of the sphere and the radius of the disks are equal. And when the radius of the sphere is k times the radius of the disks the number is 2k^2. But I can't see how four disks can cover a sphere without being distorted, in which case, the disks are no longer disks...
 
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