- 21 Mar '03 18:12

Do you mean that they all touch at least one other cylinder? or that they each touch every other cylinder?*Originally posted by royalchicken***Suppose you wish to place 7 equally-sized cylinders of length l and diameter d in such a way that they all touch each other. What is the largest value of l/d such that this is impossible?** - 25 Mar '03 02:09

Not me, the only interest I have in mathematics consists in its reduction to first-order logic with identity and set-theory. I'm a foundational type of guy.*Originally posted by royalchicken***Actually, ingenuity and trigonometry suffice. Are you guys going to give it a go, or wait around for Acolyte ?** - 30 Mar '03 02:08 / 1 editA wee hintie: 7 cylinders is the largest number for which this can be done (easy to prove), and there is only one configuration (consider that as fact; it is). To visualize it, use unsharpened pencils, or cigarettes, or just draw them (that's what I did-probably the easiest). Figure out 3, then 4, etc. Then look at limiting positions.

What is a biro? - 06 Apr '03 17:55

A biro is a very cheap pen, a ballpoint oen*Originally posted by royalchicken***A wee hintie: 7 cylinders is the largest number for which this can be done (easy to prove), and there is only one configuration (consider that as fact; it is). To visualize it, use unsharpened pencils, or cigarettes, or just draw them (that's what I did-probably the easiest). Figure out 3, then 4, etc. Then look at limiting positions.**

What is a biro?