A Class Of Algebraic Geometric Codes Generalized Hamming Weight

To obtain the generalized Hamming weights is a basic problem in coding theory, the results of generalized hamming weights of Hermite curve is well-know.It is naturely to generize the Hermite curve since [1,proposition].In this paper,we consider the cases algebraic-geometric codes(geometric Goppa codes) form algebraic curves y^q + y = x^qt+1 over finite fieldF_q^2t.Paper [7] gives its 2-th generalized Hamming weights in special condition,we give its 3-th generalized Hamming weights in this paper.