Anna Haensch, graduate student, mathematics and computer science, is on the steering committee of Fourth Annual Spuyten Duyvil Undergraduate Mathematics Conference, which is being held at SUNY-New Paltz April 25. She also will be making a presentation titled "The Pell Equation" which will discuss the Pell equation (x2-ny2=1) which was studied by the ancient Greeks and is one of the oldest Diophantine equations, and arguably the most important.