# Omega

less info
reputation
1618
bio website location age 19 member for 3 years, 3 months seen 1 hour ago profile views 207

# 94 Accepts

 Apr10 accepted About the particular solution given an homogeneous solution in a recurrence relation. Apr9 accepted How to calculate the determinant when the diagonal is in terms of $k$? Apr9 accepted How to determine column dependency without calculating the determinant? Apr9 accepted Going from $X^tAB - I = X^t$ to $X^t(AB-I) = I$ in matrix algebra. Apr9 accepted Calculating matrix determinants based on another's. Apr8 accepted What cases should I check when I am looking for the possible infinite solutions of a matrix? Apr7 accepted Determining the necessary values for a matrix' coefficients to achieve a certain rank. Apr7 accepted Why is a matrix $A$ that fulfils $AA^t = I$ invertible? Apr7 accepted How does Laplace expansion work? Apr7 accepted Find the values of $k$ that make this system inconsistent, with unique solution, and with infinite solutions. Apr6 accepted Calculating the determinant of $-2A^{-1}$ given the determinant of $A$. Apr6 accepted If a matrix is not invertible, is it still possible to find a left and/or right inverse? Apr6 accepted How to solve this homogeneous system, with a missing column? Apr5 accepted What did I do wrong with Gaussan Elimination for $\begin {cases} x + 5y + 11z = -5\\ 2x + 3y + 8z = 4\\ -x + 2y + 3z = -9 \end {cases}$? Apr2 accepted Are there no solutions for $\begin {cases} 2x+4y = 6\\ 3x+6y = 5\end {cases}$? Apr2 accepted Can all equation systems be reduced to the identity matrix? Apr1 accepted Recurrence relation to calculate the number of strings of $n$ characters that don't have consecutive vowels. Dec5 accepted Finding the explicit formula for the succession $x_0=2, x_{n+1} = 5x_n$ and proving it with induction Dec5 accepted Proving $\frac{(n+1)^4}{4}+(n+1)^3\le\frac{(n+2)^4}{4}$ for all $n \ge 1$. Dec3 accepted Proving by induction that $n(n+1)(n+2)$ is divisible by $6$ for all $n \ge 1$