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2239CDS Product Intuition 19Why can short-dated CDS have a small RPV01 even when the spread itself is wide?数理金融中等essay未尝试面试订阅2529Why Regularization Helps Even When Logistic Is Convex 11If logistic loss is already convex, why can regularization still be crucial in practice?机器学习中等essay未尝试面试订阅2534One Gradient Step on a Tiny Logistic ProblemA one-feature logistic model without intercept uses beta = 0 initially, learning rate 0.2, data x = [-1, 0, 1], and labels y = [0, 0, 1]. What is beta after one gradient step on the negative log-likelihood?机器学习困难数值题未尝试面试订阅