TY - JOUR TI - The extended variational iteration method for local fractional differential equation AU - Yang Yong-Ju JN - Thermal Science PY - 2021 VL - 25 IS - 2 SP - 1509 EP - 1516 PT - Article AB - An extended variational iteration method within the local fractional derivative is introduced for the first time, where two Lagrange multipliers are adopted. Moreover, the sufficient conditions for convergence of the new variational iteration method are also established.