1 October 2013
10:00 - 11:30am   Robert Raphael (Concordia)
A Folklore Theorem in Commutative Algebra
The talk will be held in room BH 1120

Integral extensions have properties called Lying Over and Incomparabilty established by Cohen and Seidenberg. I will present a folklore theorem I learned of in work by David Dobbs. It shows that under certain lying over and incomparable conditions, integrality holds. I follow a proof by Dobbs which uses the idea of primitive elements ie ones whose content is the whole ring.