Packing and Covering Triangles in Bilaterally-Complete Tripartite Graphs

We use Menger’s Theorem and König’s Line Colouring Theorem to show that in any tripartite graph with two complete (bipartite) sides the maximum number of pairwise edge-disjoint triangles equals the minimum number of edges that meet all triangles. This generalizes the corresponding result for complete tripartite graphs given by Lakshmanan, et al.