President Pranab Mukherjee on Thursday inaugurated the 125th birth anniversary celebrations of P C Mahalanobis at the Indian Statistical Institute in Kolkata. Addressing the teachers, researchers and students during the function, Mr Mukherjee said, dogmatism and rigidity" of mind were the most obstructive forces for progress and development. <br/><br/>He said one should accept ideas with an open mind and then analyse them to find solutions to problems. Mr Mukherjee said, this may be his last visit to Kolkata as the President of the Republic of India. The President completing his term next month.