What is p1^T, p2^T and p3^T referring to? It seems that p1 is the whole row (p1, p2, p3, p4) so when we tranpose it arent we getting a 4x1 column vector. Why is then drawn as a row vector?
mpotoole
$p_1, p_2, p_3$ are defined as 4x1 column vectors. When we take the transpose $p_1^T$, we get a row vector of size 1x4. In other words, $p_1^T$ represents the first row of our matrix $P$, $p_1$ is the transposed version of the first row of our matrix $P$.
What is p1^T, p2^T and p3^T referring to? It seems that p1 is the whole row (p1, p2, p3, p4) so when we tranpose it arent we getting a 4x1 column vector. Why is then drawn as a row vector?
$p_1, p_2, p_3$ are defined as 4x1 column vectors. When we take the transpose $p_1^T$, we get a row vector of size 1x4. In other words, $p_1^T$ represents the first row of our matrix $P$, $p_1$ is the transposed version of the first row of our matrix $P$.