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ecjb

Apparently, this user prefers to keep an air of mystery about them.

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5 Second Lemma of variation Calculus to prove the Euler-Lagrange equation Jan 6 '19
3 Derivative of a multivariate quadratic function Mar 30 '19
3 Good set of exercises with solutions for linear algebra Feb 1 '19
3 $\lim_{n \to \infty}\frac{d(x_{n+1}, x_\star)}{d(x_n, x_\star)} = 0$, show that $d(x_n, x_\star)\leq K\varepsilon^n \quad \text{for all }n\geq 0$ Jul 22 '19
3 If $A \in \mathbb{R}^{n\times n}$ and $\textbf{x}\in \mathbb{R}^{n}$why $A = \frac{1}{2} A + \frac{1}{2} A^\top $ is not always true? Sep 24 '19
3 Prove that if $\eta = \log(\frac{\phi}{1-\phi})$ then $\phi = \frac{1}{1+e^{-\eta}}$ Oct 13 '19
2 How should I know that $C^3 - 2 C + 1$ factors as $(C-1)\left(\left(C+\frac12\right)^2-\frac54\right)$? Jul 31 '19
2 Detail in the proof that eigenvectors are orthogonal Jan 1
2 show that $\textbf{u} = \textbf{v}$ if $\langle \textbf{u}, \textbf{h}\rangle + o(\|h\|) = \langle \textbf{v}, \textbf{h}\rangle + o(\|h\|)$ Jul 21 '19
2 Finding the Best linear unbiased estimator of the mean using Lagrange Multiplier Jul 14 '19
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