Speaker :Igor Doktorski Abstract: What is ordinary in ODEs? Ordinary differential equations (ODEs) are the simplest way to model timedependent phenomena. They are widely used from chemistry, over biology and physics, up to economics and medicine. ODEs are also a very helpful tool for solving Partial Differential Equations (PDEs) in mathematics - one can think about Method of Characteristics or Galerkin Approximation. So, what is so ordinary in ODEs? This question will be answered from the viewpoint of an mathematicain (me) working with PDEs ;-)