Department of Mathematics, National Tsing Hua University

Abstract：The notion of two disjoint circles in space enclosing each other is visually obvious. There is no mathematics in undergraduate or even graduate course capable of classifying linking circles. In this talk, we wish to display such examples visually with the dynamic geometry software Cabri 3D.

For your preparation: please think the following objects:
1) 2 circles in space linking each other
2) 3 circles in space each linking the other 2
3) 4 circles in space each linking the other 3.