On 25 Oct 2005 08:24:22 -0700, "Pubkeybreaker" <Robert_silverman@raytheon.com> wrote:
>Yes, he is sure. The solution to Hilbert's 10th problem by Y. >Matiyesevich (whom I once had the pleasure of meeting) and J. Robinson > (who I had also met before her untimely >death) showed that the question of whether a given diophantine >equation has a >root is undecidable.
I thought "root" was only used for a solution of an equation with one variable. And then determining wether it has a root is easy.