The discussion centers on the representation of the polar vector E in the context of group Oh, specifically questioning its components Ex, Ey, and Ez. Participants seek clarification on how to demonstrate that E serves as a basis for this group. Daniel asserts that E can be viewed as the basis of a cube represented in the Oh symmetry group. The conversation highlights the need for a deeper understanding of group theory and its application to polar vectors. Overall, the thread emphasizes the relationship between the polar vector E and the symmetry properties of group Oh.