Abstract
Byungchul Cha (cha@muhlenberg.edu) teaches at Muhlenberg College in Allentown, Pennsylvania, after working for three years at Hendrix College. He received his B.S. from the Korea Advanced Institute of Science and Technology, and his Ph.D. from Johns Hopkins University. His area of specialization is number theory. When he is not teaching calculus, he enjoys engaging his young son in doing other mathematics, such as counting from 1 to 10 and drawing octagons.
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