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Juergen Jost의 강의록 Harmonic maps between Riemannian Manifolds의 첫 section에 있는 글을 옮깁니다. A Short History of Variational Principles Among the first persons to realize the importance of variational problems and the physical significance of their solutions was G. W. Leibniz (1646-1716). In his work, however, mathematical and physical reasoning was closely interwoven with philosophical … 더 읽기