... c2,1= b, c2,3= r and we are done.Now we may assume C(1, 2) ∩ C(2, 2) = ∅ by (iii). Suppose there exists a ∈ C(1, 2) and r ∈ C(2, 2) such that a is missing from at least one of C(1, 1) or C(1, ... c2,3,c2,2,c2,1,c1,1,c1,2.Thiscoloring will complete a proper list coloring since C(1, 2) ∩ C(2, 2) = ∅. ✷the electronic journal of combinatorics 9 (20 02), #N8 5[5] F. Galvin, The list chromatic index of a bipartite ... c2,1= c1,2=x, c2,2= c1,3= a, c2,3= s and we are done.(ii): C(1, 1) ∩ C(2, 2) = ∅.(ThecaseC(2, 3) = C(1, 2) is also covered by symmetry.)Assume a is in the intersection. We may also assume...