Prof. Dr. Muhammad Sharif, Chairman Department of Mathematics delivered invited talks in Germany and USA. In Germany, he delivered talk in the 641th WE-Heraeus-Seminar “Do Black Holes Exist?-The Physics and Philosophy of Black Holes” at Physics Centre Bad Honnef during April 24-28, 2017 while in USA, he talked in Mathematical Physics and General Relativity Symposium in Honor of Professor Ivor Robinson, UTD-Dallas during May 07-09, 2017. These conferences were partially supported by host Institutes.