The Banach–Tarski paradox is a theorem in set theoretic geometry which states that a solid ball in 3-dimensional space can be split into several non-overlapping pieces, which can then be put back together in a different way to yield two identical copies of the original ball. The reassembly process involves only moving the pieces around and rotating them, without changing their shape.

The Petrucci Music Library is an internet-based collaborative music score library. You will find tens of thousands of scores composed by thousands of composers here, all available for free download.

Uitstekende how-to.