0 votes 0 votes Apply the pigeonhole argument directly to the language in $L=$ {$ww^R:w∈Σ^+$}. Theory of Computation peter-linz peter-linz-edition4 theory-of-computation regular-language pigeonhole-principle + – Naveen Kumar 3 asked Apr 12, 2019 Naveen Kumar 3 166 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.