Dr. Ajay K. Sharma, Asstt. Prof. Department of Mathematics, Shri Mata Vaishno Devi University, Katra presented a research paper entitled “Difference of composition operators” in the 6th International Conference on Mathematics and Information Sciences “ICMIS-17” which was held on 9th -11th, February, 2017 at Zewail city of Science and Technology, Cairo Egypt. In the conference some Eminent Professors from different countries like Russia, Turkey, Uzbekistan etc. also presented their work. In the research paper, Dr. Sharma presented an open problem concerning the difference of composition operators on the Hardy space.