**Dr. Ruben Hayrapetyan, professor of Mathematics**

Ph.D. in Mathematics from Yerevan Armenia State University in 1981, and a Ph.D. in Applied Mathematics, with expertise in Partial Differential Equations, Inverse and Ill-posed Problems, Nonlinear Analysis, Numerical Methods.

After working with Kettering students for eight years, Hayrapetyan finds them motivated, with a clear understanding of their goals. He enjoys convincing students that they are able to solve challenging problems both in Math and in their lives.

He sometimes experiences a challenge himself, as when he was juggling teaching both Calculus I and Calculus III classes in the same term. Hayrapetyan showed up for class one day and started a Calc III lecture. Suddenly, he had the feeling that something was wrong. He then recognized that he was delivering Calc III lecture to the Calc I class. To cover his faux pas and switch to a Calc 1 topic he said "All these important and beautiful things you will study next year. But in order to be able to understand them, let us return to Calc 1."

His advice for students is to "Study Math as much as you can, get a major or at least a minor in Math. You will never regret it. Math is the key to opening the world of modern Science and Technology."

Hidden talents: When not sharing his love of Mathematics with his students, Hayrapetyan enjoys recreational swimming, travel and reading.

Integral Transforms

Inverse Problems

Nonlinear Analysis

Numerical methods

Partial Differential Equations