Complex sentence: During its time of operation a large number of mathematical workshops were held at the center, many well known mathematicians visited the center including Eugenio Calabi, John Horton Conway, Donald E. Knuth, David Mumford, William Thurston, and Jeff Weeks.
Split into simpler sentences: During its time of operation, a large number of mathematical workshops were held at the center. Many well known mathematicians visited the center including Eugenio Calabi, John Horton Conway, Donald E. Knuth, David Mumford, William Thurston, and Jeff Weeks.