Most of what a devops person does is in fact development but it is of the non value adding variety. Basically a devops person spends the vast majority of their time configuring common off the shelf software, scripting this or that, etc.
A singular matrix is a matrix which has no inverse because its determinant is zero. If you recall, the inverse of a matrix is. 1/ ad-bc multiplied by: [ d -b ] [-c a ] If ad-bc = 0, then the inverse matrix would not exist because 1/0 is undefined, and hence it would be a singular matrix. E.g.
Row matrix: A matrix that has only one row. Column matrix: Amatrix that has only one column. Augmented matrix of the system: A matrix derived from a. system of linear equations (each written in standard form. with the constant term on the right) Coefficient matrix of the system: the matrix derived from. the coefficients of the system (but not including the.