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https://gyazo.com/274b23bb81d8668209965f5d94725c3f One: Let sum = {#, a, b} and let: L_1 = {w_1 # w_2 # ellipsis # w_m | m greaterthanorequalto 2 & for

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One: Let sum = {#, a, b} and let: L_1 = {w_1 # w_2 # ellipsis # w_m | m greaterthanorequalto 2 & for each 1 lessthanorequalto I lessthanorequalto m, w_i belongsto {a, b}^+ and for some j & k, 1 lessthanorequalto j, k lessthanorequalto m, j notequalto k, & w_j = w_k } Use the Pumping Lemma for CFLs to show L_1 is not context free

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