A.P. State Council of Science and Technology (APCOST) will celebrate the birth anniversary of mathematician Srinivasa Ramanujan, which coincides with the National Mathematics Day, on Monday. Experts in mathematics will clarify the doubts raised by school and college students on APCOST Regional Science Centre, Bhavanipuram. Special programmes on mathematics would be conducted on the occasion, according to APCOST centre in-charge J. Dilleswara Rao.