Wanderer

### Questions (47)

 12 Distance between two hyperplanes 5 Tensor mode product 5 Markov Chain Expected value 4 Solve $y'=(x+y)^2$ 3 Is the function $f(x)=x^TAx$ convex when $A \in S^n,A\geq0$,$x\in R^n$?

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 3 Complex solutions to real equation? 2 Find roots of the quadratic equation 2x²+3x+1=0 without calculating the discriminant 1 Find complex numbers (coefficients) from known roots 1 Quadratic Equations - Problem Solving 1 For any $n\ge2$ prove that $H(X_1,X_2,…,X_n)\ge\sum\limits_{i=n}^\mathbb{n}\ H(X_i|X_j , j \neq i)$

### Tags (65)

 4 complex-numbers × 2 0 linear-algebra × 9 3 quadratics × 2 0 ordinary-differential-equations × 7 2 algebra-precalculus × 3 0 multivariable-calculus × 5 1 entropy × 2 0 convex-analysis × 5 1 problem-solving 0 convex-optimization × 4

### Bookmarks (4)

 7 Area of the surface on a sphere surrounded by three externally tangent circles? 2 Existence of formulae for sines/cosines of products of angles in terms of sines/cosines of original angles? [duplicate] 1 Where did I go wrong with the Gram-Schmidt orthogonalisation process? 0 Interesting Combinatorics question relating the coefficients of variables in Pascal's Triangle