Simon Fraser University

Abstract: Representations of the Galois group of the rationals abound in nature and are important in understanding the structure of the Galois group of the rational numbers. Iwasawa theory studies certain arithmetic modules arising from such...

Abstract: In early 1960's, Lang proved that if for a given polynomial G(X,Y) with complex coefficients, there exist infinitely many pairs (x,y) where both x and y are roots of unity such that G(x,y) = 0, then essentially G(X,Y) = X^mY^n - c, for some...

Abstract: Arnold tongues are parameter regions within which dynamics of a mathematical model become mode-locked to a particularfrequency or period. Recent studies of models in a wide variety of fields (examples include models of spiking in neurons, a...

Abstract: In 1992, Thomassen obtained a beautiful proof showing that every planar graphis 5-list-colorable. Some extensions of this result will be presented. Inparticular, a new proof of Thomassen's theorem will be outlined. This proof is...