Taher Abualrub Ibrahim Sadek 0001 Legendre wavelet operational matrix of derivative for optimal control in a convective-diffusive fluid problem. 682-693 2014 351 J. Frankl. Inst. 2 https://doi.org/10.1016/j.jfranklin.2012.12.024 db/journals/jfi/jfi351.html#AbualrubS14