Question: https://gyazo.com/939bd38f8e4a2743a653f8083e5fe517 Let sigma = { #, a, b } and let: L_1 = { w_1 # w_2 # ellipsis # w_m | m greaterthanorequalto 2

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Let sigma = { #, 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 belong to {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 (and possibly other results we have studied in class, if you wish) to show L_1 is not context free

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