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题目2532 · 机器学习

Hessian of Logistic Negative Log-Likelihood 4

For one observation with score z = w^T x, what is the Hessian of the negative log-likelihood with respect to w?

题目3258 · 数学

Classify the critical point at the origin for $f(x,y)=-x^2-4y^2$.

题目3260 · 数学

Classify the critical point at the origin for $f(x,y)=-x^2+2xy-y^2$.

题目3257 · 数学

Classify the critical point at the origin for $f(x,y)=x^2-y^2$.

题目3256 · 数学

Classify the critical point at the origin for $f(x,y)=x^2+2y^2$.

题目3259 · 数学

Classify the critical point at the origin for $f(x,y)=x^2+xy+y^2$.