“…2 Barrier options are largely exchanged as they are good products for hedging and investment and they are cheaper than vanilla options, but, for Asian options, we found in literature only the analysis of the work of Atkinson and Kazantzaki, 3 which provides rigorous bounds in the arithmetic mean case.Semianalytical method for pricing of barrier options has been recently introduced for the computation of European barrier options within various differential models in other works. [4][5][6] This new approach, based on boundary element method, 7,8 turns out to be stable and efficient, especially when the differential problem is defined in an unbounded domain and the data is assigned on a limited boundary (which is the case of the "barrier options"). The method is particularly advantageous for its high accuracy, for the implicit satisfaction of the far-field behavior of the solution, and for the low discretization costs.…”