#linearalgebra

@math_stackexchange Diff. Eq. Example with Matrices #Mathematics #DifferentialEquations #LinearAlgebra

@math_stackexchange the differences and relationship between linear independent and affinely independent #Mathematics #LinearAlgebra #Geometry

@math_stackexchange What did I do wrong with Gaussan Elimination for $\begin {cases} x + 5y + 11z = -5\\ 2x + 3y + 8z = 4\\ -x + 2y + 3z = -9 \end {cases}$? #Math #LinearAlgebra #ProblemSolving

@math_stackexchange How to solve $\mathrm{diag}(x) \; A \; x = \mathbf{1}$ for $x\in\mathbb{R}^n$ with $A\in\mathbb{R}^{n \times n}$? #Mathematics #Algebra #LinearAlgebra

@math_stackexchange Composition of orthogonal projection [closed] #Mathematics #LinearAlgebra #Geometry

@math_stackexchange Solving system of linear equations with cyclic three-diagonal matrix #Mathematics #LinearAlgebra #Algorithms

@math_stackexchange For $f : V \to V$ a nilpotent endomorphism, with minimal polynomial $x^m$. Why $f^{m-1}(V) \subset ker(f)$? #Mathematics #Algebra #LinearAlgebra

@math_stackexchange Why is this true: $\|x\|_1 \le \sqrt n \cdot \|x\|_2$? #Mathematics #Math #LinearAlgebra

@math_stackexchange Proof: $\mathrm{adj}(\mathrm{adj}(A)) = (\mathrm{det}(A))^{n-2} \cdot A$ for $A \in \mathbb{R}^{n\times n}$ #Mathematics #LinearAlgebra #Proof

@math_stackexchange Why determinant of a 2 by 2 matrix is the area of a parallelogram? #Mathematics #LinearAlgebra #Geometry