On the training of scientific personnel at post-graduate school

The possibilities of modern packages symbolic mathematics for the scientific work novice researchers in are discussed. Counterexamples Schwartz theorem on equality mixed derivatives considered. It is shown how you can use graphical and computational capabilities their analysis so that with traditional engineering background understand them. article focuses problems ambiguous perception PC user three-dimensional graphic images monitor screen. This important operators who make decisions based information obtained a virtuality or reality environment. counterexamples carried out using both classical packages. this assertion not necessary. During virtual demonstration objects, recommendations terms environments provided.