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Isaak Khalatnikov, Ukrainian-Russian theoretical physicist and academic (died 2021)

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Isaak Khalatnikov
Russian physicist (1919–2021)
Isaak Markovich Khalatnikov was a leading Soviet theoretical physicist who made significant contributions to many areas of theoretical physics, including general relativity, quantum field theory, as well as the theory of quantum liquids. He is well known for his role in…Source: Wikipedia (CC BY-SA)