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金暻铉：我一直觉得，儒家思想在韩国依然非常强大。几个世纪以来，儒家思想在韩国就像是一条准则，而儒家思想的核心在于：你必须感到焦虑，你必须不断地审视自己，因为你之所以是你，完全取决于他人的评价。这关乎的不是“自我”，而是集体意识，以及群体心理的运作方式。这就是我想表达的意思。儒家思想有很多层面，但这是它的核心。韩国人将此铭记于心，甚至在潜意识里认为这就是真理。，这一点在体育直播中也有详细论述
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Often people write these metrics as \(ds^2 = \sum_{i,j} g_{ij}\,dx^i\,dx^j\), where each \(dx^i\) is a covector (1-form), i.e. an element of the dual space \(T_p^*M\). For finite dimensional vectorspaces there is a canonical isomorphism between them and their dual: given the coordinate basis \(\bigl\{\frac{\partial}{\partial x^1},\dots,\frac{\partial}{\partial x^n}\bigr\}\) of \(T_pM\), there is a unique dual basis \(\{dx^1,\dots,dx^n\}\) of \(T_p^*M\) defined by \[dx^i\!\left(\frac{\partial}{\partial x^j}\right) = \delta^i{}_j.\] This extends to isomorphisms \(T_pM \to T_p^*M\). Under this identification, the bilinear form \(g_p\) on \(T_pM \times T_pM\) is represented by the symmetric tensor \(\sum_{i,j} g_{ij}\,dx^i \otimes dx^j\) acting on pairs of tangent vectors via \[\left(\sum_{i,j} g_{ij}\,dx^i\otimes dx^j\right)\!\!\left(\frac{\partial}{\partial x^k},\frac{\partial}{\partial x^l}\right) = g_{kl},\] which recovers exactly the inner products \(g_p\!\left(\frac{\partial}{\partial x^k},\frac{\partial}{\partial x^l}\right)\) from before. So both descriptions carry identical information;。业内人士推荐币安_币安注册_币安下载作为进阶阅读