Since the beginning of civilization, human beings have been asking about the origin of the universe and the essence of all things. However, these questions can be answered quantitatively and accurately only through modern mathematics and physics. The modern cosmology established on this basis has not only opened the long history of the big bang for more than 10 billion years, but also brought n...
Mathematics and physics often have deep, unexpected connections. I will first introduce observed phenomena of gravitational lensing, its applications to the study of extrasolar planets and dark matter, and then discuss how gravitational lensing is connected to the branch of mathematics: catastrophe theory.
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