global N N_p N_fp N_faces NODETOL;
global P E N_v K r s t x y z;
global V invV M invM D_r D_s D_t D_r_weak D_s_weak D_t_weak LIFT;
global r_x r_y r_z s_x s_y s_z t_x t_y t_z J;
global n_x n_y n_z Fmask Fx Fy Fz surfJ Fscale; % surfJ contains lenghts for all the faces of elements
global EtoE EtoF;
global vmapM mapM vmapP mapP vmapB mapB;
global dt N_steps;
global rk4a rk4b rk4c;

global mesh_size_parametr;

% Advection3D problem related variables
global a_advec b_advec c_advec RHS IC BC;
global vmapI mapI vmapO mapO;