Speaker: Prof. Imre Kátai, Eötvös Lorand University, Hungary Title: On a theorem of H. Daboussi Venue: B1044 Time: 9:00-9:50, Sep. 11. Speaker: Prof. Bui Minh Phong, Eötvös Lorand University, Hungary Title: Arithmetical functions with regularity properties Venue: B1044 Time: 10:00-10:50, Sep. 11. Speaker: Prof. Ayyadurai Sankaranarayanan, School of Mathematics, Tata Institute of Fundamental Research, India. Title: On a problem of Ramanujan Venue: B1044 Time: 11:10-12:00, Sep. 11.