## tauodepwpvf

Piecewise Lanczos' tau method for linear systems of BVP.

Piecewise Lanczos' tau method for linear systems of BVP.

a = tauodepwpvf(x, y, ode, conditions, varargin)

a = taupwpvf(varargin) returns the coefficients satisfying yn = Pa,

x = independent tau variable (itau object). y = dependent tau variable (dtau oject). problem = ordinary differential equation or system (char). conditions = conditions of problem (cell of char). pieces = number of steps to execute. exact_solution = exact solution (if known, otherwise write 'no' or ''). step = step on x vector to show the results. precond = preconditioner ('no','ilu','diag'). for 'ndiad' define: 'numbd' (number od diagonals); for 'ilu' define: 'milu', 'typeilu', 'droptol', 'thresh' and 'udiag' solver = linear system solver (check guide). apsol = boolean varargin to show the graphical solution. resid = boolean varargin to show the graphical error. coeff = boolean varargin to show the coefficients a. d3spy = boolean varargin to show the spy of T matrix. infor = boolean varargin to show the inromations in CLI. saves = name varargin to save the .mat with the results.

a = coefficients such that yn = Pa. See also tau, tausys, taupw, tausyspw and schursolver.