''According to Kolmogorov, in the space of problems suggested by the real world there is a huge subspace where one can find trivial solutions. There is also a huge subspace where solutions are inaccessible. Between these two subspaces there is a tiny subspace where one can find non-trivial solutions. Mathematics operates inside this subspace. It is therefore a big achievement when one can suggest a problem setting and a resolution to this setting and also invent concepts and rules that make proofs both nontrivial and accessible (this is interesting for mathematicians). In order to transform a problem from an inaccessible one to one that has a mathematical solution very often one must simplify the setting of the problem, perform mathematical analysis, and then apply the result of this analysis to the nonsimplified real-life problem.'' [Vapnik]