Urs Bühler Abbado. Before joining Il Divo, he was mainly based in the Netherlands, singing oratorios and performing with the Netherlands Opera Gezelschap (NOG). Despite many performances there are only a handful of recordings available of him before Il Divo. In December 2003, Urs became a member of the international musical quartet Il Divo along with Carlos Marín (Spain), Sébastien Izambard (France), and David Miller (United States). He had an informal first audition with the group's creator, Simon Cowell. In Cowell's office, he simply asked Urs to sing for him unaccompanied. Impressed by Buhler's tenor voice, Cowell offered him a place in
Joe P. Buhler with a desk calculator up to class number 600, Derrick Lehmer (in the late 1940s) to about 5000, and Buhler with colleagues (in 2001) to 12 million. He continues the project with David Harvey and others. Buhler's research deals with algorithmic algebraic number theory, algebra, and cryptography. He was elected a Fellow of the American Mathematical Society in 2012. Joe P. Buhler Joe Peter Buhler (born 1950 in Vancouver, Washington) is an American mathematician. Buhler received his undergraduate degree from Reed College in 1972, and his Ph.D. from Harvard University in 1977 with thesis "Icosahedral Galois Representations" and thesis advisor