Mathematicians are interested in classifying numbers and distinguishing between different sets of them. Work in pure mathematics has been used in such diverse fields as encryption, astrophysics, and phylogenetics. Riemann sum are a method of approximating an integral with a summation, and the reverse can be done to approximate a summation with an integral. The squeeze theorem states that if an upper bound and a lower bound of a function converge to the same limit, the function must converge to that limit. Using these techniques, the limiting value of a series of exponential terms can be found in a closed form. Similar methods might be applicable to the Euler-Mascheroni constant to determine whether it is rational or irrational