# Omega

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# 123 Posts

 20h asked Why is the permanent of interest for complexity theorists? Apr10 asked What particular solution should I guess for this relation? Apr10 asked Does the order I multiply the characteristic equation's factors in the homogeneous solution matter? Apr10 asked About the particular solution given an homogeneous solution in a recurrence relation. Apr10 asked How to solve non-homogeneous recurrence relations? Apr9 asked How to calculate the determinant when the diagonal is in terms of $k$? Apr9 asked How to determine column dependency without calculating the determinant? Apr9 asked How to calculate a linear combination for a matrix' column? Apr9 asked Going from $X^tAB - I = X^t$ to $X^t(AB-I) = I$ in matrix algebra. Apr9 asked Calculating matrix determinants based on another's. Apr8 asked What cases should I check when I am looking for the possible infinite solutions of a matrix? Apr7 asked Why is a matrix $A$ that fulfils $AA^t = I$ invertible? Apr7 asked How does Laplace expansion work? Apr6 asked Determining the necessary values for a matrix' coefficients to achieve a certain rank. Apr6 asked Calculating the determinant of $-2A^{-1}$ given the determinant of $A$. Apr6 asked If a matrix is not invertible, is it still possible to find a left and/or right inverse? Apr6 asked About inverse matrixes Apr6 asked Find the values of $k$ that make this system inconsistent, with unique solution, and with infinite solutions. Apr5 asked 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 asked How to solve this homogeneous system, with a missing column?