Mark

### Questions (393)

 25 Geometric meaning of the determinant of a matrix 13 Eigenvalues of the sum of two matrices: one diagonal and the other not. 11 Sampling theorem. 11 Physical meaning of linear ODE $xy''+2y' + \lambda^2 x y = 0$ 9 Some method to solve $\int \frac{1}{\left(1+x^2\right)^{2}} dx$ and some doubts.

### Reputation (3,561)

 +10 Geometric meaning of the determinant of a matrix +10 Eigenvalues of the sum of two matrices: one diagonal and the other not. +8 A game in which players do not have the same information +5 A generalization of Perron–Frobenius claim about $\lim _{{k\rightarrow \infty }}A^{k}$.

 8 How do I evaluate these undefined limits? 5 Find $\lim_{n\to\infty} \frac{1^4+2^4+\dots+n^4}{1^4+2^4+\dots+n^4+(n+1)^4}$ 5 Find limit as x approaches infinity of exponential functions 5 Why are even/odd functions called even/odd? 4 Fidning multivariable limit

### Tags (145)

 52 calculus × 92 14 integration × 40 37 limits × 37 9 functions × 17 17 real-analysis × 19 7 linear-algebra × 36 15 sequences-and-series × 85 6 trigonometry × 11 15 multivariable-calculus × 30 6 factorial × 2