Note that when using a matrix/array, a hard bar has some other meaning that I don’t know yet. (It represents how you can do math w/ the matrix & the vector). This thing:
Some potentially useful latex:
\overset{r_1+r_2}{\longrightarrow} \begin{pmatrix} 3 & 3& 3\\ 3& 3& 3\\ 3& 3& 3 \end{pmatrix} $$ $$ \begin{bmatrix} 3&3&3\\ 4&4&4\\ 5&5&5 \end{bmatrix} \overset{testing}{\longrightarrow} \begin{bmatrix} 3&3&3\\ 4&4&4\\ 5&5&5 \end{bmatrix} $$ ## Definitions ### Pivot :drill: Scheduled: 2024-04-08 [A pivot column] is [the first column with a non-zero entry in a matrix].