# Form a matrix without using column indexes.

I want to represent a matrix
$$Gamma = ( gamma_1, gamma_2, cdots, gamma_p)$$
or
$$gamma_j = ( lambda b_j-X_j Xb) / (X_j_X_j- lambda)$$
$$X = (X_1, X_2, cdots, X_p)$$
$$lambda$$ is a constant.

How to represent the matrix $$Gamma$$ without $$gamma_j$$.