Basic class for parametre_equation

Inherits from: parametre_equation_base

To specify additional parameters for the equation when using impliciting diffusion

Parameters:

[crank] (type: int into [0, 1]) Use (1) or not (0, default) a Crank Nicholson method for the diffusion implicitation algorithm. Setting crank to 1 increases the order of the algorithm from 1 to 2.
[preconditionnement_diag] (type: int into [0, 1]) The CG used to solve the implicitation of the equation diffusion operator is not preconditioned by default. If this option is set to 1, a diagonal preconditionning is used. Warning: this option is not necessarily more efficient, depending on the treated case.
[niter_max_diffusion_implicite] (type: int) Change the maximum number of iterations for the CG (Conjugate Gradient) algorithm when solving the diffusion implicitation of the equation.
[seuil_diffusion_implicite] (type: float) Change the threshold convergence value used by default for the CG resolution for the diffusion implicitation of this equation.
[solveur] (type: solveur_sys_base) Method (different from the default one, Conjugate Gradient) to solve the linear system.

Inherits from: parametre_equation_base

Keyword to change for this equation only the parameter of the implicit scheme used to solve the problem.

Parameters:

[seuil_convergence_implicite] (type: float) Keyword to change for this equation only the value of seuil_convergence_implicite used in the implicit scheme.
[seuil_convergence_solveur] (type: float) Keyword to change for this equation only the value of seuil_convergence_solveur used in the implicit scheme
[solveur] (type: solveur_sys_base) Keyword to change for this equation only the solver used in the implicit scheme
[resolution_explicite] (type: flag) To solve explicitly the equation whereas the scheme is an implicit scheme.
[equation_non_resolue] (type: flag) Keyword to specify that the equation is not solved.
[equation_frequence_resolue] (type: string) Keyword to specify that the equation is solved only every n time steps (n is an integer or given by a time-dependent function f(t)).