Resizing and line breaking for individual matrix entries To make things easy, I have put up a pic here, I do not understand how I can reduce the size of the long entries in the matrix (the diagonal entries primarily) and also introduce line breaks so as to print a matrix similar to this one here.

Any help will be much appreciated. Thanks and regards, Florian

• welcome to tex.sx, It always helps if you post a complete small document showing the problem, If you provided a matrix with that data, someone could show you how to reformat it. – David Carlisle Sep 12 '13 at 21:13

$\mathbf{A}^{-1} = \frac{1}{\alpha} \begin{pmatrix} \begin{smallmatrix} \lambda_c \lambda_m \lambda_s + \lambda_m \lambda_s + {} \\ E^2 \lambda_c \lambda_s + E_y^2 \lambda_c \lambda_m \end{smallmatrix} & -E_x E_y \lambda_c \lambda_m & E_x E \lambda_c \lambda_s & E_x \lambda_m \lambda_s \\ -E_x E_y \lambda_c \lambda_m & \begin{smallmatrix} \lambda_c \lambda_m \lambda_s + \lambda_m \lambda_s + {} \\ E^2 \lambda_c \lambda_s + E_z^2 \lambda_c \lambda_m \end{smallmatrix} & E_y E \lambda_c \lambda_s & E_y \lambda_m \lambda_s \\ E_x E \lambda_c \lambda_s & E_y E \lambda_c \lambda_s & \begin{smallmatrix} \lambda_s^2 + {} \\ (E_z^2 + E_y^2 + \lambda_s) \lambda_c \lambda_s \end{smallmatrix} & -E \lambda_s^2 \\ E_x \lambda_m \lambda_s & E_y \lambda_m \lambda_s & -E \lambda_s^2 & \begin{smallmatrix} E^2 \lambda_s^2 + {} \\ (E_x^2 + E_y^2 + \lambda_s) \lambda_m \lambda_s \end{smallmatrix} \end{pmatrix}$ 