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The four regular faculty are Ruth Charney , associate professor in the area of topology , and three assistant professors , Sheldon Kamienny , Karl Rubin and Alice Silverberg , in the area of number theory.Harvey Friedman was among a group of distinguished scientists , mathematicians and engineers invited to a luncheon with President Ronald Reagan at the White House . Given an integer n , we seek to determine when there exists a right triangle with rational sides that has area n. There are ways to do it right and ways to do it wrong , and Congress Online shows the difference . Back-up Files : Are Yours Safe ? - If your back-up tapes are damaged or destroyed , what would the loss mean to the effectiveness and productivity of your office ? Formal power series in the perturbation parameter can be writtenfor the invariant tori of Hamiltonian systems close to integrable ones.Convergence can be proved only in special cases ( KAM theory or periodicmotions ) : more generally the series have to be summed with suitablesummation rules obtaining nevertheless nontrivial analyticity properties in the ( small ) perturbation parameter . From the early applicants for 1985 we see signs that the progress will continue.Of course the credit for all of this really belongs to those aforementioned Math Department stalwarts , Joan and Jim Leitzel , John Riedl , Frank Demana and Bert Waits in particular , but it has been such a pleasure to be associated with them over the years that I 'm not going to gainsay my part in encouraging them , providing support , and persuading the Board of Regents , the Trustees and the University Senate to do the " right thing " by the youth of Ohio . Indonesia BoundJack Tull , associate professor of mathematics , will spend the next two years at Gadjah Mada University in Yogyakarta , Indonesia . She believes she 's made the right decision .