Skullgreymon

### Questions (18)

 4 Half quadratic splitting (alternating optimization with penalty) 4 How is it deduced the Dirichlet energy? 3 Eigenvalues of $XX^T$ 3 About radial solutions of Laplace's equation. 3 A problem of linear algebra (Symmetric and antisymmetric matrixs and diagonalization)

### Reputation (594)

 +15 How is it deduced the Dirichlet energy? +5 Applications of Lax Milgram theorem +5 Half quadratic splitting (alternating optimization with penalty) +5 Caracterization of strongly convex

 4 Use the Mean Value Theorem to show that: $|\cos(x) - \cos(y)| \leq |x-y|$ 4 Adding Eigenvectors 4 Is this set a linear subspace of $\mathbb{R}^{2}$? $U=\left\{\begin{pmatrix} 4t^{3}\\t^{2}\end{pmatrix}\in\mathbb{R}^{2}:t\in\mathbb{R} \right\}$ 2 Permutations vs. Combinations 2 Is $[a,b]$ a finite or an infinite set?

### Tags (46)

 9 linear-algebra × 5 4 eigenvalues-eigenvectors × 2 6 real-analysis × 6 2 elementary-set-theory 5 calculus × 6 2 descriptive-statistics 5 abstract-algebra × 2 2 equivalence-relations 4 statistics × 3 1 ring-theory

### Accounts (11)

 Mathematics 594 rep 22 silver badges1717 bronze badges Stack Overflow 123 rep 11 silver badge77 bronze badges MathOverflow 111 rep 22 bronze badges English Language Learners 101 rep 11 bronze badge Signal Processing 101 rep 11 bronze badge