1. Yang-Mills theory is basically a gauge theory based on unitary groups to describe the behaviour of the elementary particles. It is used for unifying the week force with electromagnetic force and also to create the quantum theory of the strong force, quantum chromodynamics
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4. T. Padmanabhan, Gravitation-Foundations and Frontiers (Cambridge University Press, UK, 2010)
5. Some dates and features of the association between KBJ and MS were gathered from Prof. Sarangadharan, who is a colleague of both