Brst Symmetry and de Rham Cohomology

Prof. Soon-Tae Hong, who served as a faculty member at Ewha Women’s University and is currently a research professor at the Department of Physics at Sogang University, has researched the quantum field theory: string theory. He presented ＂Hong-Cho String Singularity Theorem＂ which studied the singularity of the geodesic surface congruence for time-like and null strings using the expansion of the universe in the string theory. It is a new approach to explain Big Bang theory applying the string theory. Also, he is one of Springer authors of ＂Concise Encyclopedia of Supersymmetry＂ published in 2004 and recorded in Marquis Who’s Who in the World and in Science and Engineering.