// !{! C_T \frac{\partial T}{\partial t} - \nabla \cdot ( K_T \nabla T) = 0 !}!
// !{! C_M \frac{\partial M}{\partial t} - \nabla \cdot ( K_M \nabla M + K_{TM} \nabla T) = 0 !}!
// !{! \rho \frac{\partial^2 U}{\partial t^2} - \nabla \cdot \sigma = 0 !}!
// !{! \rho \frac{\partial^2 U}{\partial t^2} - \nabla \cdot (E(\epsilon - \beta_M \Delta M - \beta_T \Delta T)) = 0 !}!
// !{! \nabla \cdot \sigma = 0 !}!
// !{! \sigma = E(\epsilon - \beta_M \Delta M - \beta_T \Delta T) !}!
// !{! \epsilon_{ij} = \frac{1}{2}(U_{i,j} + U_{j,i}) !}!
// !{! C_T = C_T(\rho,T,M) !}!
// !{! C_M = C_M(\rho,T,M) !}!
// !{! K_T = K_T(\rho,T,M) !}!
// !{! K_M = K_M(\rho,T,M) !}!
// !{! K_{TM} = K_{TM}(\rho,T,M) !}!
// !{! E = E(\rho,T,M) !}!
// !{! \beta_T = \beta_T(\rho,T,M) !}!
// !{! \beta_M = \beta_M(\rho,T,M) !}!
// !{! T !}!
// !{! M !}!
// !{! U !}!
// !{! \Delta M = (M - M_0) !}!
// !{! \Delta T = (T - T_0) !}!
// !{! \Delta M = (M - M_p) !}!
// !{! \Delta T = (T - T_p) !}!
// !{! \nabla \cdot (E(\epsilon - \beta_M \Delta M - \beta_T \Delta T)) = 0 !}!
// !{! M = M_0 !}!
// !{! U = 0 !}!
// !{! \sigma = 0 !}!
// !{! T = T_0 !}!
// !{! q_M = h(M - M_{\infty}) !}!
// !{! U_z \ge 0 !}!
// !{! \sigma_n = P !}!
// !{! T = T_P !}!
// !{! t \in [0,4\ min[ !}!
// !{! t \in [4\ min, \infty !}!
// !{! \Gamma_b !}!
// !{! \Gamma_h !}!
// !{! \Gamma_0 !}!
// !{! \Gamma_{sx} !}!
// !{! \Gamma_{sy} !}!
// !{! U_x = 0 !}!
// !{! U_y = 0 !}!
// !{! \forall t \in [4\ min, \infty\ \ \ \exists X \in \Gamma_b\ tel\ que\ U_z(X) = 0 !}!
// !{! \min\limits_{DDL} U_z = 0 \leftrightarrow \prod\limits_{DDL} U_z = 0 !}!