Wilbur Wright’s understanding of complex, dynamicproblems contributed to his and his brother Orville’ssuccessful first airplane flight. Wilbur understood,for example, that, to turn a bicycle to the ...

In a previous blog [1] I wrote: During my academic career I have observed that one of the most difficult subjects to teach as well as to learn is systems theory. All those poles and zeros may make ...

We give a numerical criterion for a badly conditioned zero of a system of analytic equations to be part of a cluster of two zeros. Journal Information This journal, begun in 1943 as Mathematical ...