Cosmology and Field Theory : (April 2020) : [Non-integrable part is newly added. (2024.1) ]

This is the English version of "Dawn of Cosmology"" which was written in Japanese some time ago. At that time, I thought the Japanese version must be sufficient since this is the simplified version of my field theory textbooks. However since then, there are some progresses in this field of research, and therefore, I decided writing up a textbook which is largely and newly rewritten for young people in the world. I believe that this textbook may be used as a field theory textbook for graduate students and young physicists as well. But still this book should be considered to be the first step toward understanding the textbooks, "Symmetry and Its Breaking in Quantum Field Theory" (Nova Science Publishers, 2011) and [ Fundamental Problems in Quantum Field Theory ( Bentham Publishers, 2013) ].