Complex sentence: During the short period of existence, the institute had a string of prominent mathematicians as visitors, including S.S. Pillai, noted number theorist, V. Ganapathy Iyer, analyst and Norbert Wiener.
Split into simpler sentences: During the short period of existence, the Institute was fortunate to have a string of very prominent mathematicians as visitors. These include S.S. Pillai, noted number theorist, V. Ganapathy Iyer, analyst and Norbert Wiener.