Aspects of Quintessence Matter - the Driver of the Late Time Acceleration of the Universe

This is to certify that the thesis entitled " Aspects of Quintessence Matter-The Driver of the Late Time Acceleration of the Universe " , submitted by Sudipta Das who got her name registered on 23rd April, 2004 for the award of Ph.D (Sciences) degree of Jadavpur University, is absolutely based upon her own work under the supervision of Dr. Narayan Banerjee and that neither this thesis nor any part of it has been submitted for any degree or any other academic award anywhere before. Acknowledgement At the very outset, I express my sincere gratitude to my supervisor Dr. Narayan Banerjee for his generous help, care, support and encouragement during my entire tenure as a research student. In the truest sense he is my friend, philosopher and guide. I owe to him whatever knowledge I have about General Relativity and Cosmology. I am also greatly indebted to him for teaching me the values of life and above all for guiding me to become a good human being. I shall always try to follow his advices. He has also coauthored in all the five papers.