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Pade approximation and non-singlet structure function up to N^3LO

We apply a method of estimating perturbative coefficients in Quantum Field Theory using Pade approximations. In our QCD analysis we have performed this method to determine 4-loop anomalous dimension and 3-loop Wilson coefficients and found that the method works very well. By using Pade approximations, the results of our non-singlet QCD analysis for the experimental data of the deep-inelastic neutrino-nucleon scattering up to N3LO have been calculated. The analysis is based on the associated Jacobi polynomials technique of reconstruction of the structure functions from its Mellin moments. Our results of parton densities xuv(x,Q) and xdv(x,Q), ΛQCD and αs(M z ) have been presented.