### Questions (259)

 128 Intuitive explanation of entropy 34 Taking a derivative with respect to a matrix 29 Why does cross product give a vector which is perpendicular to a plane 23 Why does polynomial factorization generalize to matrices 12 Newton's method in higher dimensions explained

### Reputation (7,443)

 +10 Taylor's theorem for vector valued functions +10 Intuitive explanation of entropy +10 Why does cross product give a vector which is perpendicular to a plane +10 Interpreting higher order differentials

 6 Reparameterization of hyperprior distribution 3 Solving $df/dx = x\log x$ 2 How to calculate the integral $\int_0^\infty \exp\left(-\frac{x^2}{2\sigma^2}\right)x^{d-1}\,dx$ 2 Solving a functional problem with break points 2 Separation of variables with three independent variables

### Tags (138)

 8 bayesian × 20 4 integration × 21 6 probability × 42 2 calculus-of-variations × 15 6 ordinary-differential-equations × 21 2 normal-distribution × 11 6 change-of-variable × 3 2 partial-differential-equations × 5 4 calculus × 83 2 algebra-precalculus × 2

### Bookmarks (35)

 289 What is the importance of eigenvalues/eigenvectors? 229 What is the result of $\infty - \infty$? 164 What is the geometric interpretation of the transpose? 128 Intuitive explanation of entropy 120 Why is the eigenvector of a covariance matrix equal to a principal component?