Recent content by jerryczj

For the three parts of your question, you are dealing with three points in Rk: x, y, and z. Draw a picture of x and y at a distance of d apart. Now add a point z. For part 2, it's pretty clear from the geometry that there is only one place that z could be. For part 3, it's also pretty clear...

OMG,will somebody tell me why there is not anybody replied?

I think Jean Tirole and Drew Fudenberg's Game Theory and Osborne and Rubinstein's A Course in Game Theory will satisfy you. If not, I recommend that you can search some essays in this area.

Homework Statement This is a problem from baby rudin in Chapter 1, I've done all of them except this(problem 16). suppose k>=3,x,y belongs to [R][/k],|x-y|=d>0,and r>0.prove: (1)if 2r>d, there are infinitely many z belong to R(k) such that |z-x|=|z-y|=r. (2)if 2r=d, there is exactly one...